20937473280 has 432 divisors, whose sum is σ = 75137431824. Its totient is φ = 5379194880.

The previous prime is 20937473257. The next prime is 20937473327. The reversal of 20937473280 is 8237473902.

20937473280 is a `hidden beast` number, since 209 + 374 + 73 + 2 + 8 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 627803136 + 20309670144 = 25056^2 + 142512^2 .

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45814812 + ... + 45815268.

Almost surely, 2^20937473280 is an apocalyptic number.

20937473280 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 20937473280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37568715912).

20937473280 is an abundant number, since it is smaller than the sum of its proper divisors (54199958544).

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

20937473280 is a wasteful number, since it uses less digits than its factorization.

20937473280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 20937473280 in words is "twenty billion, nine hundred thirty-seven million, four hundred seventy-three thousand, two hundred eighty".