21313110136024 has 64 divisors (see below), whose sum is σ = 45709683701760. Its totient is φ = 9126445426560.

The previous prime is 21313110136009. The next prime is 21313110136063. The reversal of 21313110136024 is 42063101131312.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 21313110135983 and 21313110136001.

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, 638272369 + ... + 638305759.

It is an arithmetic number, because the mean of its divisors is an integer number (714213807840).

Almost surely, 2^{21313110136024} is an apocalyptic number.

It is an amenable number.

21313110136024 is an abundant number, since it is smaller than the sum of its proper divisors (24396573565736).

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

21313110136024 is a wasteful number, since it uses less digits than its factorization.

21313110136024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42728 (or 42724 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 21313110136024 its reverse (42063101131312), we get a palindrome (63376211267336).

The spelling of 21313110136024 in words is "twenty-one trillion, three hundred thirteen billion, one hundred ten million, one hundred thirty-six thousand, twenty-four".