21415314984 has 64 divisors (see below), whose sum is σ = 61214624640. Its totient is φ = 6115860480.

The previous prime is 21415314931. The next prime is 21415315001. The reversal of 21415314984 is 48941351412.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 353824 + ... + 409904.

It is an arithmetic number, because the mean of its divisors is an integer number (956478510).

Almost surely, 2^21415314984 is an apocalyptic number.

21415314984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21415314984 is an abundant number, since it is smaller than the sum of its proper divisors (39799309656).

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

21415314984 is a wasteful number, since it uses less digits than its factorization.

21415314984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58370 (or 58366 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The spelling of 21415314984 in words is "twenty-one billion, four hundred fifteen million, three hundred fourteen thousand, nine hundred eighty-four".