21423313104 has 80 divisors (see below), whose sum is σ = 55748431872. Its totient is φ = 7088980864.

The previous prime is 21423313097. The next prime is 21423313123. The reversal of 21423313104 is 40131332412.

It is a happy number.

It is a super-2 number, since 2×21423313104² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8840437 + ... + 8842859.

Almost surely, 2^21423313104 is an apocalyptic number.

21423313104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21423313104 is an abundant number, since it is smaller than the sum of its proper divisors (34325118768).

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

21423313104 is a wasteful number, since it uses less digits than its factorization.

21423313104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704 (or 3698 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21423313104 its reverse (40131332412), we get a palindrome (61554645516).

The spelling of 21423313104 in words is "twenty-one billion, four hundred twenty-three million, three hundred thirteen thousand, one hundred four".