21424053000 has 256 divisors, whose sum is σ = 76592355840. Its totient is φ = 4884096000.

The previous prime is 21424052989. The next prime is 21424053011. The reversal of 21424053000 is 35042412.

It is an interprime number because it is at equal distance from previous prime (21424052989) and next prime (21424053011).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9679894 + ... + 9682106.

It is an arithmetic number, because the mean of its divisors is an integer number (299188890).

Almost surely, 2^21424053000 is an apocalyptic number.

21424053000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21424053000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38296177920).

21424053000 is an abundant number, since it is smaller than the sum of its proper divisors (55168302840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21424053000 is a wasteful number, since it uses less digits than its factorization.

21424053000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705 (or 2691 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 21424053000 its reverse (35042412), we get a palindrome (21459095412).

The spelling of 21424053000 in words is "twenty-one billion, four hundred twenty-four million, fifty-three thousand".