23021986 has 16 divisors (see below), whose sum is σ = 37611000. Its totient is φ = 10505088.

The previous prime is 23021983. The next prime is 23021987. The reversal of 23021986 is 68912032.

It can be written as a sum of positive squares in 4 ways, for example, as 11015761 + 12006225 = 3319^2 + 3465^2 .

It is not an unprimeable number, because it can be changed into a prime (23021983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2661 + ... + 7288.

Almost surely, 2^23021986 is an apocalyptic number.

23021986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

23021986 is a deficient number, since it is larger than the sum of its proper divisors (14589014).

23021986 is a wasteful number, since it uses less digits than its factorization.

23021986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10053.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 23021986 is about 4798.1231747424. The cubic root of 23021986 is about 284.4772854447.

The spelling of 23021986 in words is "twenty-three million, twenty-one thousand, nine hundred eighty-six".