20468879 has 4 divisors (see below), whose sum is σ = 20715576. Its totient is φ = 20222184.

The previous prime is 20468869. The next prime is 20468893. The reversal of 20468879 is 97886402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97886402 = 2 ⋅48943201.

It is a cyclic number.

It is not a de Polignac number, because 20468879 - 2⁴ = 20468863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20468849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123224 + ... + 123389.

It is an arithmetic number, because the mean of its divisors is an integer number (5178894).

Almost surely, 2^20468879 is an apocalyptic number.

20468879 is a deficient number, since it is larger than the sum of its proper divisors (246697).

20468879 is an equidigital number, since it uses as much as digits as its factorization.

20468879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246696.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 20468879 is about 4524.2545242283. The cubic root of 20468879 is about 273.5466199952.

The spelling of 20468879 in words is "twenty million, four hundred sixty-eight thousand, eight hundred seventy-nine".