20502383577 has 16 divisors (see below), whose sum is σ = 29493766848. Its totient is φ = 12593517120.

The previous prime is 20502383567. The next prime is 20502383581. The reversal of 20502383577 is 77538320502.

It is not a de Polignac number, because 20502383577 - 2⁶ = 20502383513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20502383507) 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, 464763 + ... + 506960.

It is an arithmetic number, because the mean of its divisors is an integer number (1843360428).

Almost surely, 2^20502383577 is an apocalyptic number.

It is an amenable number.

20502383577 is a deficient number, since it is larger than the sum of its proper divisors (8991383271).

20502383577 is a wasteful number, since it uses less digits than its factorization.

20502383577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972280.

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 20502383577 in words is "twenty billion, five hundred two million, three hundred eighty-three thousand, five hundred seventy-seven".