20751652512 has 36 divisors (see below), whose sum is σ = 59012512650. Its totient is φ = 6917217408.

The previous prime is 20751652511. The next prime is 20751652517. The reversal of 20751652512 is 21525615702.

20751652512 is a `hidden beast` number, since 20 + 75 + 1 + 6 + 52 + 512 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20450144016 + 301508496 = 143004^2 + 17364^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (20751652511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36026887 + ... + 36027462.

Almost surely, 2^20751652512 is an apocalyptic number.

It is an amenable number.

20751652512 is an abundant number, since it is smaller than the sum of its proper divisors (38260860138).

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

20751652512 is a wasteful number, since it uses less digits than its factorization.

20751652512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72054365 (or 72054354 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 20751652512 in words is "twenty billion, seven hundred fifty-one million, six hundred fifty-two thousand, five hundred twelve".