23432981 has 12 divisors (see below), whose sum is σ = 27740076. Its totient is φ = 19662720.

The previous prime is 23432963. The next prime is 23432989. The reversal of 23432981 is 18923432.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13256881 + 10176100 = 3641^2 + 3190^2 .

It is not a de Polignac number, because 23432981 - 2¹⁸ = 23170837 is a prime.

It is a super-2 number, since 2×23432981² = 1098209197092722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23432989) 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 11 ways as a sum of consecutive naturals, for example, 5876 + ... + 9021.

It is an arithmetic number, because the mean of its divisors is an integer number (2311673).

Almost surely, 2^23432981 is an apocalyptic number.

It is an amenable number.

23432981 is a deficient number, since it is larger than the sum of its proper divisors (4307095).

23432981 is a wasteful number, since it uses less digits than its factorization.

23432981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14932 (or 14921 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 23432981 is about 4840.7624399468. The cubic root of 23432981 is about 286.1601666964.

The spelling of 23432981 in words is "twenty-three million, four hundred thirty-two thousand, nine hundred eighty-one".