20555115572 has 24 divisors (see below), whose sum is σ = 37890985440. Its totient is φ = 9729871200.

The previous prime is 20555115563. The next prime is 20555115611. The reversal of 20555115572 is 27551155502.

It is a Harshad number since it is a multiple of its sum of digits (38).

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, 17078 + ... + 203474.

It is an arithmetic number, because the mean of its divisors is an integer number (1578791060).

Almost surely, 2^20555115572 is an apocalyptic number.

It is an amenable number.

20555115572 is a deficient number, since it is larger than the sum of its proper divisors (17335869868).

20555115572 is a wasteful number, since it uses less digits than its factorization.

20555115572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187871 (or 187869 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 38.

The spelling of 20555115572 in words is "twenty billion, five hundred fifty-five million, one hundred fifteen thousand, five hundred seventy-two".