20149236 has 30 divisors (see below), whose sum is σ = 52674930. Its totient is φ = 6716304.

The previous prime is 20149211. The next prime is 20149237. The reversal of 20149236 is 63294102.

It can be written as a sum of positive squares in only one way, i.e., 13616100 + 6533136 = 3690^2 + 2556^2 .

It is a super-2 number, since 2×20149236² = 811983422767392, which contains 22 as substring.

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 (20149237) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 30771 + ... + 31418.

It is an arithmetic number, because the mean of its divisors is an integer number (1755831).

Almost surely, 2^20149236 is an apocalyptic number.

It is an amenable number.

20149236 is an abundant number, since it is smaller than the sum of its proper divisors (32525694).

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

20149236 is a wasteful number, since it uses less digits than its factorization.

20149236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62205 (or 62194 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20149236 is about 4488.7900374154. The cubic root of 20149236 is about 272.1152373589.

The spelling of 20149236 in words is "twenty million, one hundred forty-nine thousand, two hundred thirty-six".