20517422471502 has 32 divisors (see below), whose sum is σ = 47398537476864. Its totient is φ = 5851671292800.

The previous prime is 20517422471453. The next prime is 20517422471543.

20517422471502 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9143235274 + ... + 9143237517.

It is an arithmetic number, because the mean of its divisors is an integer number (1481204296152).

Almost surely, 2^{20517422471502} is an apocalyptic number.

20517422471502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20517422471502 is an abundant number, since it is smaller than the sum of its proper divisors (26881115005362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20517422471502 is a wasteful number, since it uses less digits than its factorization.

20517422471502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18286472824.

The product of its (nonzero) digits is 313600, while the sum is 42.

The spelling of 20517422471502 in words is "twenty trillion, five hundred seventeen billion, four hundred twenty-two million, four hundred seventy-one thousand, five hundred two".