20157068 has 12 divisors (see below), whose sum is σ = 36412992. Its totient is φ = 9753360.

The previous prime is 20157061. The next prime is 20157077. The reversal of 20157068 is 86075102.

It is a self number, because there is not a number n which added to its sum of digits gives 20157068.

It is not an unprimeable number, because it can be changed into a prime (20157061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81155 + ... + 81402.

It is an arithmetic number, because the mean of its divisors is an integer number (3034416).

Almost surely, 2^20157068 is an apocalyptic number.

It is an amenable number.

20157068 is a deficient number, since it is larger than the sum of its proper divisors (16255924).

20157068 is a wasteful number, since it uses less digits than its factorization.

20157068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162592 (or 162590 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 20157068 is about 4489.6623481059. The cubic root of 20157068 is about 272.1504898198.

The spelling of 20157068 in words is "twenty million, one hundred fifty-seven thousand, sixty-eight".