20185136 has 10 divisors (see below), whose sum is σ = 39108732. Its totient is φ = 10092560.

The previous prime is 20185133. The next prime is 20185147. The reversal of 20185136 is 63158102.

It is not an unprimeable number, because it can be changed into a prime (20185133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630770 + ... + 630801.

Almost surely, 2^20185136 is an apocalyptic number.

It is an amenable number.

20185136 is a deficient number, since it is larger than the sum of its proper divisors (18923596).

20185136 is a wasteful number, since it uses less digits than its factorization.

20185136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261579 (or 1261573 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 20185136 is about 4492.7871082436. The cubic root of 20185136 is about 272.2767511911.

The spelling of 20185136 in words is "twenty million, one hundred eighty-five thousand, one hundred thirty-six".