20179245672 has 24 divisors (see below), whose sum is σ = 54652123890. Its totient is φ = 6726415200.

The previous prime is 20179245641. The next prime is 20179245683. The reversal of 20179245672 is 27654297102.

20179245672 is a `hidden beast` number, since 20 + 179 + 2 + 456 + 7 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19828582596 + 350663076 = 140814^2 + 18726^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140133579 + ... + 140133722.

Almost surely, 2^20179245672 is an apocalyptic number.

It is an amenable number.

20179245672 is an abundant number, since it is smaller than the sum of its proper divisors (34472878218).

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

20179245672 is a wasteful number, since it uses less digits than its factorization.

20179245672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280267313 (or 280267306 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 20179245672 in words is "twenty billion, one hundred seventy-nine million, two hundred forty-five thousand, six hundred seventy-two".