205972331520 has 88 divisors (see below), whose sum is σ = 658789678224. Its totient is φ = 54925950976.

The previous prime is 205972331507. The next prime is 205972331557. The reversal of 205972331520 is 25133279502.

It is a congruent number.

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, 6689469 + ... + 6720188.

Almost surely, 2^205972331520 is an apocalyptic number.

205972331520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205972331520 is an abundant number, since it is smaller than the sum of its proper divisors (452817346704).

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

205972331520 is a wasteful number, since it uses less digits than its factorization.

205972331520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13409685 (or 13409667 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 205972331520 in words is "two hundred five billion, nine hundred seventy-two million, three hundred thirty-one thousand, five hundred twenty".