20500216572 has 48 divisors (see below), whose sum is σ = 54451176192. Its totient is φ = 5942090880.

The previous prime is 20500216571. The next prime is 20500216577. The reversal of 20500216572 is 27561200502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500216571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3373153 + ... + 3379224.

It is an arithmetic number, because the mean of its divisors is an integer number (1134399504).

Almost surely, 2^20500216572 is an apocalyptic number.

20500216572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20500216572 is an abundant number, since it is smaller than the sum of its proper divisors (33950959620).

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

20500216572 is a wasteful number, since it uses less digits than its factorization.

20500216572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752418 (or 6752416 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 20500216572 in words is "twenty billion, five hundred million, two hundred sixteen thousand, five hundred seventy-two".