205021253552 has 20 divisors (see below), whose sum is σ = 397239611496. Its totient is φ = 102507805440.

The previous prime is 205021253473. The next prime is 205021253617. The reversal of 205021253552 is 255352120502.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502328 + ... + 813864.

Almost surely, 2^205021253552 is an apocalyptic number.

It is an amenable number.

205021253552 is a deficient number, since it is larger than the sum of its proper divisors (192218357944).

205021253552 is a wasteful number, since it uses less digits than its factorization.

205021253552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352676 (or 352670 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 205021253552 in words is "two hundred five billion, twenty-one million, two hundred fifty-three thousand, five hundred fifty-two".