21041310140 has 24 divisors (see below), whose sum is σ = 45612131712. Its totient is φ = 8145023040.

The previous prime is 21041310137. The next prime is 21041310161. The reversal of 21041310140 is 4101314012.

It is a happy number.

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, 16968179 + ... + 16969418.

It is an arithmetic number, because the mean of its divisors is an integer number (1900505488).

Almost surely, 2^21041310140 is an apocalyptic number.

21041310140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21041310140 is an abundant number, since it is smaller than the sum of its proper divisors (24570821572).

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

21041310140 is a wasteful number, since it uses less digits than its factorization.

21041310140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33937637 (or 33937635 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21041310140 its reverse (4101314012), we get a palindrome (25142624152).

The spelling of 21041310140 in words is "twenty-one billion, forty-one million, three hundred ten thousand, one hundred forty".