20258015 has 4 divisors (see below), whose sum is σ = 24309624. Its totient is φ = 16206408.

The previous prime is 20257997. The next prime is 20258023. The reversal of 20258015 is 51085202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20258015 - 2²² = 16063711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2025797 + ... + 2025806.

It is an arithmetic number, because the mean of its divisors is an integer number (6077406).

Almost surely, 2^20258015 is an apocalyptic number.

20258015 is a deficient number, since it is larger than the sum of its proper divisors (4051609).

20258015 is an equidigital number, since it uses as much as digits as its factorization.

20258015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051608.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 20258015 is about 4500.8904674520. The cubic root of 20258015 is about 272.6040452222.

The spelling of 20258015 in words is "twenty million, two hundred fifty-eight thousand, fifteen".