20465136 has 50 divisors (see below), whose sum is σ = 59235792. Its totient is φ = 6821280.

The previous prime is 20465131. The next prime is 20465143. The reversal of 20465136 is 63156402.

20465136 is a `hidden beast` number, since 2 + 0 + 4 + 651 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20465131) 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 9 ways as a sum of consecutive naturals, for example, 6600 + ... + 9191.

Almost surely, 2^20465136 is an apocalyptic number.

It is an amenable number.

20465136 is an abundant number, since it is smaller than the sum of its proper divisors (38770656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20465136 is a wasteful number, since it uses less digits than its factorization.

20465136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15811 (or 15796 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20465136 is about 4523.8408460069. The cubic root of 20465136 is about 273.5299451296.

The spelling of 20465136 in words is "twenty million, four hundred sixty-five thousand, one hundred thirty-six".