20386838520 has 48 divisors (see below), whose sum is σ = 66257226360. Its totient is φ = 5436490176.

The previous prime is 20386838501. The next prime is 20386838533. The reversal of 20386838520 is 2583868302.

20386838520 is a `hidden beast` number, since 2 + 0 + 38 + 68 + 38 + 520 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28314694 + ... + 28315413.

Almost surely, 2^20386838520 is an apocalyptic number.

20386838520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20386838520 is an abundant number, since it is smaller than the sum of its proper divisors (45870387840).

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

20386838520 is a wasteful number, since it uses less digits than its factorization.

20386838520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56630124 (or 56630117 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 20386838520 in words is "twenty billion, three hundred eighty-six million, eight hundred thirty-eight thousand, five hundred twenty".