20253179 has 4 divisors (see below), whose sum is σ = 21133776. Its totient is φ = 19372584.

The previous prime is 20253173. The next prime is 20253187. The reversal of 20253179 is 97135202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97135202 = 2 ⋅48567601.

It is a cyclic number.

It is not a de Polignac number, because 20253179 - 2⁸ = 20252923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20253173) 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, 440264 + ... + 440309.

It is an arithmetic number, because the mean of its divisors is an integer number (5283444).

Almost surely, 2^20253179 is an apocalyptic number.

20253179 is a deficient number, since it is larger than the sum of its proper divisors (880597).

20253179 is an equidigital number, since it uses as much as digits as its factorization.

20253179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880596.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20253179 is about 4500.3532083604. The cubic root of 20253179 is about 272.5823514535.

The spelling of 20253179 in words is "twenty million, two hundred fifty-three thousand, one hundred seventy-nine".