21140373460 has 48 divisors (see below), whose sum is σ = 48006411264. Its totient is φ = 7789388288.

The previous prime is 21140373451. The next prime is 21140373493. The reversal of 21140373460 is 6437304112.

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, 645484 + ... + 677443.

It is an arithmetic number, because the mean of its divisors is an integer number (1000133568).

Almost surely, 2^21140373460 is an apocalyptic number.

21140373460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21140373460 is an abundant number, since it is smaller than the sum of its proper divisors (26866037804).

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

21140373460 is a wasteful number, since it uses less digits than its factorization.

21140373460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323000 (or 1322998 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 21140373460 its reverse (6437304112), we get a palindrome (27577677572).

The spelling of 21140373460 in words is "twenty-one billion, one hundred forty million, three hundred seventy-three thousand, four hundred sixty".