21329573462784 has 108 divisors (see below), whose sum is σ = 63482238793792. Its totient is φ = 6880507545600.

The previous prime is 21329573462777. The next prime is 21329573462789. The reversal of 21329573462784 is 48726437592312.

It is a happy number.

21329573462784 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 95 + 7 + 3 + 462 + 7 + 84 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21329573462789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149245147 + ... + 149387994.

Almost surely, 2^{21329573462784} is an apocalyptic number.

21329573462784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21329573462784 is an abundant number, since it is smaller than the sum of its proper divisors (42152665331008).

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

21329573462784 is a wasteful number, since it uses less digits than its factorization.

21329573462784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298633194 (or 298633177 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 63.

The spelling of 21329573462784 in words is "twenty-one trillion, three hundred twenty-nine billion, five hundred seventy-three million, four hundred sixty-two thousand, seven hundred eighty-four".