23418940 has 12 divisors (see below), whose sum is σ = 49179816. Its totient is φ = 9367568.

The previous prime is 23418907. The next prime is 23418943. The reversal of 23418940 is 4981432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23418943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585454 + ... + 585493.

It is an arithmetic number, because the mean of its divisors is an integer number (4098318).

Almost surely, 2^23418940 is an apocalyptic number.

23418940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23418940 is an abundant number, since it is smaller than the sum of its proper divisors (25760876).

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

23418940 is a wasteful number, since it uses less digits than its factorization.

23418940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170956 (or 1170954 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 23418940 is about 4839.3119345626. The cubic root of 23418940 is about 286.1029997247.

The spelling of 23418940 in words is "twenty-three million, four hundred eighteen thousand, nine hundred forty".