21601631174054 has 32 divisors (see below), whose sum is σ = 33049522195200. Its totient is φ = 10586427207840.

The previous prime is 21601631174033. The next prime is 21601631174063. The reversal of 21601631174054 is 45047113610612.

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, 45103457 + ... + 45579875.

It is an arithmetic number, because the mean of its divisors is an integer number (1032797568600).

Almost surely, 2^{21601631174054} is an apocalyptic number.

21601631174054 is a deficient number, since it is larger than the sum of its proper divisors (11447891021146).

21601631174054 is a wasteful number, since it uses less digits than its factorization.

21601631174054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477788.

The product of its (nonzero) digits is 120960, while the sum is 41.

Adding to 21601631174054 its reverse (45047113610612), we get a palindrome (66648744784666).

The spelling of 21601631174054 in words is "twenty-one trillion, six hundred one billion, six hundred thirty-one million, one hundred seventy-four thousand, fifty-four".