23913019 has 4 divisors (see below), whose sum is σ = 25752496. Its totient is φ = 22073544.

The previous prime is 23913011. The next prime is 23913041. The reversal of 23913019 is 91031932.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23913019 - 2³ = 23913011 is a prime.

It is a super-2 number, since 2×23913019² = 1143664955388722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23913011) 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, 919719 + ... + 919744.

It is an arithmetic number, because the mean of its divisors is an integer number (6438124).

Almost surely, 2^23913019 is an apocalyptic number.

23913019 is a deficient number, since it is larger than the sum of its proper divisors (1839477).

23913019 is a wasteful number, since it uses less digits than its factorization.

23913019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839476.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 23913019 is about 4890.0939663773. The cubic root of 23913019 is about 288.1010247114.

The spelling of 23913019 in words is "twenty-three million, nine hundred thirteen thousand, nineteen".