20823965420 has 48 divisors (see below), whose sum is σ = 47516851200. Its totient is φ = 7636628160.

The previous prime is 20823965413. The next prime is 20823965441. The reversal of 20823965420 is 2456932802.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 872090 + ... + 895649.

It is an arithmetic number, because the mean of its divisors is an integer number (989934400).

Almost surely, 2^20823965420 is an apocalyptic number.

20823965420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20823965420 is an abundant number, since it is smaller than the sum of its proper divisors (26692885780).

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

20823965420 is a wasteful number, since it uses less digits than its factorization.

20823965420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767798 (or 1767796 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 20823965420 in words is "twenty billion, eight hundred twenty-three million, nine hundred sixty-five thousand, four hundred twenty".