20715647876 has 36 divisors (see below), whose sum is σ = 46004885136. Its totient is φ = 8071030800.

The previous prime is 20715647873. The next prime is 20715647977. The reversal of 20715647876 is 67874651702.

It is a happy number.

It is a super-2 number, since 2×20715647876² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20715647873) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4802030 + ... + 4806341.

It is an arithmetic number, because the mean of its divisors is an integer number (1277913476).

Almost surely, 2^20715647876 is an apocalyptic number.

It is an amenable number.

20715647876 is an abundant number, since it is smaller than the sum of its proper divisors (25289237260).

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

20715647876 is a wasteful number, since it uses less digits than its factorization.

20715647876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9608400 (or 9608391 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 20715647876 in words is "twenty billion, seven hundred fifteen million, six hundred forty-seven thousand, eight hundred seventy-six".