20157051 has 4 divisors (see below), whose sum is σ = 26876072. Its totient is φ = 13438032.

The previous prime is 20157047. The next prime is 20157061. The reversal of 20157051 is 15075102.

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

It is not a de Polignac number, because 20157051 - 2² = 20157047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20157061) 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, 3359506 + ... + 3359511.

It is an arithmetic number, because the mean of its divisors is an integer number (6719018).

Almost surely, 2^20157051 is an apocalyptic number.

20157051 is a deficient number, since it is larger than the sum of its proper divisors (6719021).

20157051 is an equidigital number, since it uses as much as digits as its factorization.

20157051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6719020.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 20157051 is about 4489.6604548674. The cubic root of 20157051 is about 272.1504133113.

The spelling of 20157051 in words is "twenty million, one hundred fifty-seven thousand, fifty-one".