21432176316072 has 24 divisors (see below), whose sum is σ = 58045477522890. Its totient is φ = 7144058772000.

The previous prime is 21432176315993. The next prime is 21432176316097. The reversal of 21432176316072 is 27061367123412.

It is a happy number.

21432176316072 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 2 + 1 + 7 + 6 + 31 + 607 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16288052935716 + 5144123380356 = 4035846^2 + 2268066^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 148834557679 + ... + 148834557822.

Almost surely, 2^{21432176316072} is an apocalyptic number.

It is an amenable number.

21432176316072 is an abundant number, since it is smaller than the sum of its proper divisors (36613301206818).

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

21432176316072 is a wasteful number, since it uses less digits than its factorization.

21432176316072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297669115513 (or 297669115506 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 21432176316072 in words is "twenty-one trillion, four hundred thirty-two billion, one hundred seventy-six million, three hundred sixteen thousand, seventy-two".