20271487057920 has 1360 divisors, whose sum is σ = 83586388406400. Its totient is φ = 4623163195392.

The previous prime is 20271487057903. The next prime is 20271487057931. The reversal of 20271487057920 is 2975078417202.

20271487057920 is a `hidden beast` number, since 2 + 0 + 2 + 7 + 1 + 48 + 7 + 0 + 579 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 45148077856 + ... + 45148078304.

Almost surely, 2^{20271487057920} is an apocalyptic number.

20271487057920 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 20271487057920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41793194203200).

20271487057920 is an abundant number, since it is smaller than the sum of its proper divisors (63314901348480).

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

20271487057920 is an frugal number, since it uses more digits than its factorization.

20271487057920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 54.

The spelling of 20271487057920 in words is "twenty trillion, two hundred seventy-one billion, four hundred eighty-seven million, fifty-seven thousand, nine hundred twenty".