20508158572 has 96 divisors (see below), whose sum is σ = 41368320000. Its totient is φ = 8812362240.

The previous prime is 20508158557. The next prime is 20508158621. The reversal of 20508158572 is 27585180502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8547429 + ... + 8549827.

It is an arithmetic number, because the mean of its divisors is an integer number (430920000).

Almost surely, 2^20508158572 is an apocalyptic number.

20508158572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20508158572 is an abundant number, since it is smaller than the sum of its proper divisors (20860161428).

20508158572 is a wasteful number, since it uses less digits than its factorization.

20508158572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599 (or 2597 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 43.

The spelling of 20508158572 in words is "twenty billion, five hundred eight million, one hundred fifty-eight thousand, five hundred seventy-two".