20748879 has 20 divisors (see below), whose sum is σ = 31254784. Its totient is φ = 13716864.

The previous prime is 20748877. The next prime is 20748881. The reversal of 20748879 is 97884702.

It is an interprime number because it is at equal distance from previous prime (20748877) and next prime (20748881).

It is not a de Polignac number, because 20748879 - 2¹ = 20748877 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 (20748877) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9279 + ... + 11295.

Almost surely, 2^20748879 is an apocalyptic number.

20748879 is a deficient number, since it is larger than the sum of its proper divisors (10505905).

20748879 is a wasteful number, since it uses less digits than its factorization.

20748879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156 (or 2147 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 20748879 is about 4555.0937421748. The cubic root of 20748879 is about 274.7882844303.

The spelling of 20748879 in words is "twenty million, seven hundred forty-eight thousand, eight hundred seventy-nine".