20879755 has 8 divisors (see below), whose sum is σ = 26983152. Its totient is φ = 15418848.

The previous prime is 20879753. The next prime is 20879767. The reversal of 20879755 is 55797802.

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

It is a cyclic number.

It is not a de Polignac number, because 20879755 - 2¹ = 20879753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20879753) 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, 160549 + ... + 160678.

It is an arithmetic number, because the mean of its divisors is an integer number (3372894).

Almost surely, 2^20879755 is an apocalyptic number.

20879755 is a deficient number, since it is larger than the sum of its proper divisors (6103397).

20879755 is a wasteful number, since it uses less digits than its factorization.

20879755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321245.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 20879755 is about 4569.4370550430. The cubic root of 20879755 is about 275.3648270851.

The spelling of 20879755 in words is "twenty million, eight hundred seventy-nine thousand, seven hundred fifty-five".