23731394 has 4 divisors (see below), whose sum is σ = 35597094. Its totient is φ = 11865696.

The previous prime is 23731391. The next prime is 23731397. The reversal of 23731394 is 49313732.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (23731391) and next prime (23731397).

It can be written as a sum of positive squares in only one way, i.e., 22705225 + 1026169 = 4765^2 + 1013^2 .

It is a super-2 number, since 2×23731394² = 1126358122366472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23731394.

It is not an unprimeable number, because it can be changed into a prime (23731391) 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 as a sum of consecutive naturals, namely, 5932847 + ... + 5932850.

Almost surely, 2^23731394 is an apocalyptic number.

23731394 is a deficient number, since it is larger than the sum of its proper divisors (11865700).

23731394 is a wasteful number, since it uses less digits than its factorization.

23731394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11865699.

The product of its digits is 13608, while the sum is 32.

The square root of 23731394 is about 4871.4878630661. The cubic root of 23731394 is about 287.3697718957.

The spelling of 23731394 in words is "twenty-three million, seven hundred thirty-one thousand, three hundred ninety-four".