20516887018552 has 32 divisors (see below), whose sum is σ = 40157659320480. Its totient is φ = 9808531729920.

The previous prime is 20516887018547. The next prime is 20516887018603. The reversal of 20516887018552 is 25581078861502.

It is a happy number.

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, 21651333 + ... + 22579060.

It is an arithmetic number, because the mean of its divisors is an integer number (1254926853765).

Almost surely, 2^{20516887018552} is an apocalyptic number.

It is an amenable number.

20516887018552 is a deficient number, since it is larger than the sum of its proper divisors (19640772301928).

20516887018552 is a wasteful number, since it uses less digits than its factorization.

20516887018552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44232943 (or 44232939 counting only the distinct ones).

The product of its (nonzero) digits is 10752000, while the sum is 58.

The spelling of 20516887018552 in words is "twenty trillion, five hundred sixteen billion, eight hundred eighty-seven million, eighteen thousand, five hundred fifty-two".