20537176420 has 24 divisors (see below), whose sum is σ = 43299906048. Its totient is φ = 8182140000.

The previous prime is 20537176357. The next prime is 20537176427. The reversal of 20537176420 is 2467173502.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20537176420.

It is not an unprimeable number, because it can be changed into a prime (20537176427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2040516 + ... + 2050555.

It is an arithmetic number, because the mean of its divisors is an integer number (1804162752).

Almost surely, 2^20537176420 is an apocalyptic number.

20537176420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20537176420 is an abundant number, since it is smaller than the sum of its proper divisors (22762729628).

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

20537176420 is a wasteful number, since it uses less digits than its factorization.

20537176420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091331 (or 4091329 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 20537176420 in words is "twenty billion, five hundred thirty-seven million, one hundred seventy-six thousand, four hundred twenty".