23451940 has 24 divisors (see below), whose sum is σ = 49875840. Its totient is φ = 9261408.

The previous prime is 23451937. The next prime is 23451949. The reversal of 23451940 is 4915432.

It is a junction number, because it is equal to n+sod(n) for n = 23451899 and 23451908.

It is not an unprimeable number, because it can be changed into a prime (23451949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5842 + ... + 9001.

It is an arithmetic number, because the mean of its divisors is an integer number (2078160).

Almost surely, 2^23451940 is an apocalyptic number.

23451940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23451940 is an abundant number, since it is smaller than the sum of its proper divisors (26423900).

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

23451940 is a wasteful number, since it uses less digits than its factorization.

23451940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14931 (or 14929 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 23451940 is about 4842.7203099085. The cubic root of 23451940 is about 286.2373207455.

The spelling of 23451940 in words is "twenty-three million, four hundred fifty-one thousand, nine hundred forty".