20339157 has 32 divisors (see below), whose sum is σ = 30046464. Its totient is φ = 12185600.

The previous prime is 20339149. The next prime is 20339167. The reversal of 20339157 is 75193302.

It is not a de Polignac number, because 20339157 - 2³ = 20339149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20339147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148393 + ... + 148529.

It is an arithmetic number, because the mean of its divisors is an integer number (938952).

Almost surely, 2^20339157 is an apocalyptic number.

It is an amenable number.

20339157 is a deficient number, since it is larger than the sum of its proper divisors (9707307).

20339157 is a wasteful number, since it uses less digits than its factorization.

20339157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 20339157 is about 4509.8954533337. The cubic root of 20339157 is about 272.9675255553.

The spelling of 20339157 in words is "twenty million, three hundred thirty-nine thousand, one hundred fifty-seven".