20015256332272 has 20 divisors (see below), whose sum is σ = 38779636565440. Its totient is φ = 10007608186368.

The previous prime is 20015256332249. The next prime is 20015256332303. The reversal of 20015256332272 is 27223365251002.

It is a super-2 number, since 2×20015256332272² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 10192513 + ... + 11996575.

It is an arithmetic number, because the mean of its divisors is an integer number (1938981828272).

Almost surely, 2^{20015256332272} is an apocalyptic number.

It is an amenable number.

20015256332272 is a deficient number, since it is larger than the sum of its proper divisors (18764380233168).

20015256332272 is a wasteful number, since it uses less digits than its factorization.

20015256332272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497480 (or 2497474 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 20015256332272 in words is "twenty trillion, fifteen billion, two hundred fifty-six million, three hundred thirty-two thousand, two hundred seventy-two".