20316157 has 8 divisors (see below), whose sum is σ = 20640384. Its totient is φ = 19994688.

The previous prime is 20316151. The next prime is 20316161. The reversal of 20316157 is 75161302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20316157 - 2¹⁹ = 19791869 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 (20316151) 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, 17868 + ... + 18970.

It is an arithmetic number, because the mean of its divisors is an integer number (2580048).

Almost surely, 2^20316157 is an apocalyptic number.

It is an amenable number.

20316157 is a deficient number, since it is larger than the sum of its proper divisors (324227).

20316157 is a wasteful number, since it uses less digits than its factorization.

20316157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 20316157 is about 4507.3447837946. The cubic root of 20316157 is about 272.8645940341.

Adding to 20316157 its reverse (75161302), we get a palindrome (95477459).

The spelling of 20316157 in words is "twenty million, three hundred sixteen thousand, one hundred fifty-seven".