23381740 has 24 divisors (see below), whose sum is σ = 49194432. Its totient is φ = 9335040.

The previous prime is 23381737. The next prime is 23381741. The reversal of 23381740 is 4718332.

It is a junction number, because it is equal to n+sod(n) for n = 23381699 and 23381708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23381741) 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, 16957 + ... + 18283.

It is an arithmetic number, because the mean of its divisors is an integer number (2049768).

Almost surely, 2^23381740 is an apocalyptic number.

23381740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23381740 is an abundant number, since it is smaller than the sum of its proper divisors (25812692).

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

23381740 is a wasteful number, since it uses less digits than its factorization.

23381740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217 (or 2215 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 23381740 is about 4835.4668854207. The cubic root of 23381740 is about 285.9514319209.

The spelling of 23381740 in words is "twenty-three million, three hundred eighty-one thousand, seven hundred forty".