21631615450134 has 16 divisors (see below), whose sum is σ = 43283419087872. Its totient is φ = 7207173785448.

The previous prime is 21631615450117. The next prime is 21631615450163. The reversal of 21631615450134 is 43105451613612.

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, 841160554 + ... + 841186269.

It is an arithmetic number, because the mean of its divisors is an integer number (2705213692992).

Almost surely, 2^{21631615450134} is an apocalyptic number.

21631615450134 is an abundant number, since it is smaller than the sum of its proper divisors (21651803637738).

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

21631615450134 is a wasteful number, since it uses less digits than its factorization.

21631615450134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682348971.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 21631615450134 in words is "twenty-one trillion, six hundred thirty-one billion, six hundred fifteen million, four hundred fifty thousand, one hundred thirty-four".