21096457140 has 48 divisors (see below), whose sum is σ = 64440089280. Its totient is φ = 5114292480.

The previous prime is 21096457127. The next prime is 21096457163. The reversal of 21096457140 is 4175469012.

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, 15981505 + ... + 15982824.

It is an arithmetic number, because the mean of its divisors is an integer number (1342501860).

Almost surely, 2^21096457140 is an apocalyptic number.

21096457140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21096457140 is an abundant number, since it is smaller than the sum of its proper divisors (43343632140).

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

21096457140 is a wasteful number, since it uses less digits than its factorization.

21096457140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31964352 (or 31964350 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 21096457140 in words is "twenty-one billion, ninety-six million, four hundred fifty-seven thousand, one hundred forty".