20415392920 has 32 divisors (see below), whose sum is σ = 49468068720. Its totient is φ = 7537991040.

The previous prime is 20415392909. The next prime is 20415392923. The reversal of 20415392920 is 2929351402.

It is a super-2 number, since 2×20415392920² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20415392920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415392923) 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, 19629666 + ... + 19630705.

Almost surely, 2^20415392920 is an apocalyptic number.

20415392920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20415392920 is an abundant number, since it is smaller than the sum of its proper divisors (29052675800).

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

20415392920 is a wasteful number, since it uses less digits than its factorization.

20415392920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39260395 (or 39260391 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 20415392920 in words is "twenty billion, four hundred fifteen million, three hundred ninety-two thousand, nine hundred twenty".