20258879 has 8 divisors (see below), whose sum is σ = 21146832. Its totient is φ = 19389760.

The previous prime is 20258873. The next prime is 20258897. The reversal of 20258879 is 97885202.

It is a happy number.

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 20258879 - 2⁴ = 20258863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20258873) 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, 2489 + ... + 6834.

It is an arithmetic number, because the mean of its divisors is an integer number (2643354).

Almost surely, 2^20258879 is an apocalyptic number.

20258879 is a deficient number, since it is larger than the sum of its proper divisors (887953).

20258879 is an equidigital number, since it uses as much as digits as its factorization.

20258879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9417.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 20258879 is about 4500.9864474357. The cubic root of 20258879 is about 272.6079206685.

The spelling of 20258879 in words is "twenty million, two hundred fifty-eight thousand, eight hundred seventy-nine".