20920624420 has 24 divisors (see below), whose sum is σ = 43977685248. Its totient is φ = 8359797600.

The previous prime is 20920624409. The next prime is 20920624423. The reversal of 20920624420 is 2442602902.

It is a super-2 number, since 2×20920624420² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20920624423) 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, 507946 + ... + 547585.

It is an arithmetic number, because the mean of its divisors is an integer number (1832403552).

Almost surely, 2^20920624420 is an apocalyptic number.

20920624420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20920624420 is an abundant number, since it is smaller than the sum of its proper divisors (23057060828).

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

20920624420 is a wasteful number, since it uses less digits than its factorization.

20920624420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056531 (or 1056529 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 20920624420 in words is "twenty billion, nine hundred twenty million, six hundred twenty-four thousand, four hundred twenty".