23321730 has 16 divisors (see below), whose sum is σ = 55972224. Its totient is φ = 6219120.

The previous prime is 23321719. The next prime is 23321737. The reversal of 23321730 is 3712332.

It is a super-3 number, since 3×23321730³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23321697 and 23321706.

It is not an unprimeable number, because it can be changed into a prime (23321737) 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, 388666 + ... + 388725.

It is an arithmetic number, because the mean of its divisors is an integer number (3498264).

Almost surely, 2^23321730 is an apocalyptic number.

23321730 is an abundant number, since it is smaller than the sum of its proper divisors (32650494).

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

23321730 is a wasteful number, since it uses less digits than its factorization.

23321730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777401.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 23321730 is about 4829.2577069359. The cubic root of 23321730 is about 285.7065877688.

The spelling of 23321730 in words is "twenty-three million, three hundred twenty-one thousand, seven hundred thirty".