21653535435052 has 24 divisors (see below), whose sum is σ = 38166808614480. Its totient is φ = 10748735036160.

The previous prime is 21653535435043. The next prime is 21653535435067. The reversal of 21653535435052 is 25053453535612.

It is a junction number, because it is equal to n+sod(n) for n = 21653535434987 and 21653535435005.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50918568 + ... + 51342064.

It is an arithmetic number, because the mean of its divisors is an integer number (1590283692270).

Almost surely, 2^{21653535435052} is an apocalyptic number.

It is an amenable number.

21653535435052 is a deficient number, since it is larger than the sum of its proper divisors (16513273179428).

21653535435052 is a wasteful number, since it uses less digits than its factorization.

21653535435052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515601 (or 515599 counting only the distinct ones).

The product of its (nonzero) digits is 8100000, while the sum is 49.

The spelling of 21653535435052 in words is "twenty-one trillion, six hundred fifty-three billion, five hundred thirty-five million, four hundred thirty-five thousand, fifty-two".