20717231054 has 16 divisors (see below), whose sum is σ = 33664328880. Its totient is φ = 9561796920.

The previous prime is 20717231047. The next prime is 20717231089. The reversal of 20717231054 is 45013271702.

It is a self number, because there is not a number n which added to its sum of digits gives 20717231054.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2353052 + ... + 2361839.

It is an arithmetic number, because the mean of its divisors is an integer number (2104020555).

Almost surely, 2^20717231054 is an apocalyptic number.

20717231054 is a deficient number, since it is larger than the sum of its proper divisors (12947097826).

20717231054 is an equidigital number, since it uses as much as digits as its factorization.

20717231054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4714932 (or 4714906 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The spelling of 20717231054 in words is "twenty billion, seven hundred seventeen million, two hundred thirty-one thousand, fifty-four".