20715600761 has 16 divisors (see below), whose sum is σ = 21432902400. Its totient is φ = 20011536768.

The previous prime is 20715600749. The next prime is 20715600847. The reversal of 20715600761 is 16700651702.

It is a cyclic number.

It is not a de Polignac number, because 20715600761 - 2¹⁴ = 20715584377 is a prime.

It is a super-2 number, since 2×20715600761² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20715500761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1121045 + ... + 1139373.

It is an arithmetic number, because the mean of its divisors is an integer number (1339556400).

Almost surely, 2^20715600761 is an apocalyptic number.

It is an amenable number.

20715600761 is a deficient number, since it is larger than the sum of its proper divisors (717301639).

20715600761 is a wasteful number, since it uses less digits than its factorization.

20715600761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18688.

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 20715600761 in words is "twenty billion, seven hundred fifteen million, six hundred thousand, seven hundred sixty-one".