20721179482 has 8 divisors (see below), whose sum is σ = 31092246900. Its totient is φ = 10357097184.

The previous prime is 20721179417. The next prime is 20721179497. The reversal of 20721179482 is 28497112702.

It can be written as a sum of positive squares in 2 ways, for example, as 19903848561 + 817330921 = 141081^2 + 28589^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738857 + ... + 1750732.

Almost surely, 2^20721179482 is an apocalyptic number.

20721179482 is a deficient number, since it is larger than the sum of its proper divisors (10371067418).

20721179482 is a wasteful number, since it uses less digits than its factorization.

20721179482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492560.

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 20721179482 in words is "twenty billion, seven hundred twenty-one million, one hundred seventy-nine thousand, four hundred eighty-two".