20210157 has 12 divisors (see below), whose sum is σ = 31846464. Its totient is φ = 12248520.

The previous prime is 20210149. The next prime is 20210159. The reversal of 20210157 is 75101202.

It is not a de Polignac number, because 20210157 - 2³ = 20210149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101973 + ... + 102170.

It is an arithmetic number, because the mean of its divisors is an integer number (2653872).

Almost surely, 2^20210157 is an apocalyptic number.

It is an amenable number.

20210157 is a deficient number, since it is larger than the sum of its proper divisors (11636307).

20210157 is a wasteful number, since it uses less digits than its factorization.

20210157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204160 (or 204157 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 20210157 is about 4495.5708202630. The cubic root of 20210157 is about 272.3892072677.

Adding to 20210157 its reverse (75101202), we get a palindrome (95311359).

The spelling of 20210157 in words is "twenty million, two hundred ten thousand, one hundred fifty-seven".