20700512280 has 320 divisors, whose sum is σ = 79976160000. Its totient is φ = 4704189696.

The previous prime is 20700512269. The next prime is 20700512297. The reversal of 20700512280 is 8221500702.

20700512280 is a `hidden beast` number, since 2 + 0 + 70 + 0 + 512 + 2 + 80 = 666.

It is a super-2 number, since 2×20700512280² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4057171 + ... + 4062269.

It is an arithmetic number, because the mean of its divisors is an integer number (249925500).

Almost surely, 2^20700512280 is an apocalyptic number.

20700512280 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 20700512280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39988080000).

20700512280 is an abundant number, since it is smaller than the sum of its proper divisors (59275647720).

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

20700512280 is a wasteful number, since it uses less digits than its factorization.

20700512280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5308 (or 5295 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The spelling of 20700512280 in words is "twenty billion, seven hundred million, five hundred twelve thousand, two hundred eighty".