21862937040 has 640 divisors, whose sum is σ = 86826442752. Its totient is φ = 4433510400.

The previous prime is 21862937009. The next prime is 21862937051. The reversal of 21862937040 is 4073926812.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 21862936983 and 21862937001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 54520840 + ... + 54521240.

Almost surely, 2^21862937040 is an apocalyptic number.

21862937040 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 21862937040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43413221376).

21862937040 is an abundant number, since it is smaller than the sum of its proper divisors (64963505712).

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

21862937040 is a wasteful number, since it uses less digits than its factorization.

21862937040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 21862937040 in words is "twenty-one billion, eight hundred sixty-two million, nine hundred thirty-seven thousand, forty".