21029596423650 has 72 divisors (see below), whose sum is σ = 56542945058964. Its totient is φ = 5603581776000.

The previous prime is 21029596423609. The next prime is 21029596423679. The reversal of 21029596423650 is 5632469592012.

21029596423650 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 9 + 596 + 42 + 3 + 6 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 4087671196401 + 16941925227249 = 2021799^2 + 4116057^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17374749 + ... + 18545648.

Almost surely, 2^{21029596423650} is an apocalyptic number.

21029596423650 is an abundant number, since it is smaller than the sum of its proper divisors (35513348635314).

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

21029596423650 is a wasteful number, since it uses less digits than its factorization.

21029596423650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35921716 (or 35921708 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 21029596423650 in words is "twenty-one trillion, twenty-nine billion, five hundred ninety-six million, four hundred twenty-three thousand, six hundred fifty".