20530379520 has 216 divisors, whose sum is σ = 81180861216. Its totient is φ = 4692639744.

The previous prime is 20530379473. The next prime is 20530379533. The reversal of 20530379520 is 2597303502.

20530379520 is a `hidden beast` number, since 2 + 0 + 530 + 3 + 79 + 52 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46657 + ... + 207936.

Almost surely, 2^20530379520 is an apocalyptic number.

20530379520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20530379520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40590430608).

20530379520 is an abundant number, since it is smaller than the sum of its proper divisors (60650481696).

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

20530379520 is a wasteful number, since it uses less digits than its factorization.

20530379520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254627 (or 254610 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 36.

The spelling of 20530379520 in words is "twenty billion, five hundred thirty million, three hundred seventy-nine thousand, five hundred twenty".