23149836 has 18 divisors (see below), whose sum is σ = 58517732. Its totient is φ = 7716600.

The previous prime is 23149831. The next prime is 23149837. The reversal of 23149836 is 63894132.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 643051 = 23149836 / (2 + 3 + 1 + 4 + 9 + 8 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 23149836.

It is not an unprimeable number, because it can be changed into a prime (23149831) 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 5 ways as a sum of consecutive naturals, for example, 321490 + ... + 321561.

Almost surely, 2^23149836 is an apocalyptic number.

It is an amenable number.

23149836 is an abundant number, since it is smaller than the sum of its proper divisors (35367896).

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

23149836 is a wasteful number, since it uses less digits than its factorization.

23149836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643061 (or 643056 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 23149836 is about 4811.4276467593. The cubic root of 23149836 is about 285.0029177910.

The spelling of 23149836 in words is "twenty-three million, one hundred forty-nine thousand, eight hundred thirty-six".