20974179 has 8 divisors (see below), whose sum is σ = 28424272. Its totient is φ = 13753440.

The previous prime is 20974171. The next prime is 20974189. The reversal of 20974179 is 97147902.

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

It is not a de Polignac number, because 20974179 - 2³ = 20974171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20974171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57124 + ... + 57489.

It is an arithmetic number, because the mean of its divisors is an integer number (3553034).

Almost surely, 2^20974179 is an apocalyptic number.

20974179 is a deficient number, since it is larger than the sum of its proper divisors (7450093).

20974179 is a wasteful number, since it uses less digits than its factorization.

20974179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114677.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 20974179 is about 4579.7575263326. The cubic root of 20974179 is about 275.7792947832.

The spelling of 20974179 in words is "twenty million, nine hundred seventy-four thousand, one hundred seventy-nine".