20257153 has 4 divisors (see below), whose sum is σ = 23151040. Its totient is φ = 17363268.

The previous prime is 20257121. The next prime is 20257163. The reversal of 20257153 is 35175202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20257153 - 2⁵ = 20257121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20257163) 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, 1446933 + ... + 1446946.

It is an arithmetic number, because the mean of its divisors is an integer number (5787760).

Almost surely, 2^20257153 is an apocalyptic number.

It is an amenable number.

20257153 is a deficient number, since it is larger than the sum of its proper divisors (2893887).

20257153 is an equidigital number, since it uses as much as digits as its factorization.

20257153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2893886.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 20257153 is about 4500.7947076044. The cubic root of 20257153 is about 272.6001786371.

The spelling of 20257153 in words is "twenty million, two hundred fifty-seven thousand, one hundred fifty-three".