21716078472 has 48 divisors (see below), whose sum is σ = 64161143280. Its totient is φ = 6580629600.

The previous prime is 21716078459. The next prime is 21716078479. The reversal of 21716078472 is 27487061712.

21716078472 is a `hidden beast` number, since 2 + 17 + 160 + 7 + 8 + 472 = 666.

It is not an unprimeable number, because it can be changed into a prime (21716078479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13708854 + ... + 13710437.

It is an arithmetic number, because the mean of its divisors is an integer number (1336690485).

Almost surely, 2^21716078472 is an apocalyptic number.

21716078472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21716078472 is an abundant number, since it is smaller than the sum of its proper divisors (42445064808).

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

21716078472 is a wasteful number, since it uses less digits than its factorization.

21716078472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27419314 (or 27419307 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The spelling of 21716078472 in words is "twenty-one billion, seven hundred sixteen million, seventy-eight thousand, four hundred seventy-two".