20502350765 has 48 divisors (see below), whose sum is σ = 28446878592. Its totient is φ = 14144562432.

The previous prime is 20502350753. The next prime is 20502350779. The reversal of 20502350765 is 56705320502.

It is not a de Polignac number, because 20502350765 - 2²² = 20498156461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 823439 + ... + 847971.

It is an arithmetic number, because the mean of its divisors is an integer number (592643304).

Almost surely, 2^20502350765 is an apocalyptic number.

It is an amenable number.

20502350765 is a deficient number, since it is larger than the sum of its proper divisors (7944527827).

20502350765 is a wasteful number, since it uses less digits than its factorization.

20502350765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24630 (or 24617 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 35.

The spelling of 20502350765 in words is "twenty billion, five hundred two million, three hundred fifty thousand, seven hundred sixty-five".