20654124765 has 16 divisors (see below), whose sum is σ = 33067279296. Its totient is φ = 11008640000.

The previous prime is 20654124739. The next prime is 20654124767. The reversal of 20654124765 is 56742145602.

It is a de Polignac number, because none of the positive numbers 2^k-20654124765 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20654124767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406011 + ... + 454040.

It is an arithmetic number, because the mean of its divisors is an integer number (2066704956).

Almost surely, 2^20654124765 is an apocalyptic number.

It is an amenable number.

20654124765 is a deficient number, since it is larger than the sum of its proper divisors (12413154531).

20654124765 is a wasteful number, since it uses less digits than its factorization.

20654124765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861660.

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 20654124765 in words is "twenty billion, six hundred fifty-four million, one hundred twenty-four thousand, seven hundred sixty-five".