20157430 has 16 divisors (see below), whose sum is σ = 37861344. Its totient is φ = 7712320.

The previous prime is 20157421. The next prime is 20157433. The reversal of 20157430 is 3475102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20157433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43591 + ... + 44050.

It is an arithmetic number, because the mean of its divisors is an integer number (2366334).

Almost surely, 2^20157430 is an apocalyptic number.

20157430 is a deficient number, since it is larger than the sum of its proper divisors (17703914).

20157430 is a wasteful number, since it uses less digits than its factorization.

20157430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87671.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20157430 is about 4489.7026627606. The cubic root of 20157430 is about 272.1521189901.

The spelling of 20157430 in words is "twenty million, one hundred fifty-seven thousand, four hundred thirty".