23091930 has 24 divisors (see below), whose sum is σ = 60039252. Its totient is φ = 6157824.

The previous prime is 23091923. The next prime is 23091947. The reversal of 23091930 is 3919032.

It can be written as a sum of positive squares in 2 ways, for example, as 21261321 + 1830609 = 4611^2 + 1353^2 .

It is a super-2 number, since 2×23091930² = 1066474462249800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23091894 and 23091903.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128199 + ... + 128378.

Almost surely, 2^23091930 is an apocalyptic number.

23091930 is an abundant number, since it is smaller than the sum of its proper divisors (36947322).

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

23091930 is a wasteful number, since it uses less digits than its factorization.

23091930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256590 (or 256587 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 23091930 is about 4805.4063303742. The cubic root of 23091930 is about 284.7650880516.

The spelling of 23091930 in words is "twenty-three million, ninety-one thousand, nine hundred thirty".