20457151 has 16 divisors (see below), whose sum is σ = 24867360. Its totient is φ = 16571520.

The previous prime is 20457149. The next prime is 20457161. The reversal of 20457151 is 15175402.

It is a cyclic number.

It is not a de Polignac number, because 20457151 - 2¹ = 20457149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20457131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1681 + ... + 6613.

It is an arithmetic number, because the mean of its divisors is an integer number (1554210).

Almost surely, 2^20457151 is an apocalyptic number.

20457151 is a deficient number, since it is larger than the sum of its proper divisors (4410209).

20457151 is a wasteful number, since it uses less digits than its factorization.

20457151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 20457151 is about 4522.9582133820. The cubic root of 20457151 is about 273.4943655837.

The spelling of 20457151 in words is "twenty million, four hundred fifty-seven thousand, one hundred fifty-one".