21062630400 has 792 divisors, whose sum is σ = 84204900720. Its totient is φ = 4624220160.

The previous prime is 21062630387. The next prime is 21062630401. The reversal of 21062630400 is 403626012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21062630401) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 109132704 + ... + 109132896.

Almost surely, 2^21062630400 is an apocalyptic number.

21062630400 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 21062630400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42102450360).

21062630400 is an abundant number, since it is smaller than the sum of its proper divisors (63142270320).

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

21062630400 is a wasteful number, since it uses less digits than its factorization.

21062630400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 239 counting only the distinct ones).

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

The spelling of 21062630400 in words is "twenty-one billion, sixty-two million, six hundred thirty thousand, four hundred".