23018949 has 12 divisors (see below), whose sum is σ = 33343596. Its totient is φ = 15302592.

The previous prime is 23018923. The next prime is 23018987. The reversal of 23018949 is 94981032.

It can be written as a sum of positive squares in 2 ways, for example, as 4485924 + 18533025 = 2118^2 + 4305^2 .

It is not a de Polignac number, because 23018949 - 2²⁰ = 21970373 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23018449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72 + ... + 6785.

It is an arithmetic number, because the mean of its divisors is an integer number (2778633).

Almost surely, 2^23018949 is an apocalyptic number.

It is an amenable number.

23018949 is a deficient number, since it is larger than the sum of its proper divisors (10324647).

23018949 is a wasteful number, since it uses less digits than its factorization.

23018949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7236 (or 7233 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 23018949 is about 4797.8066863933. The cubic root of 23018949 is about 284.4647757289.

The spelling of 23018949 in words is "twenty-three million, eighteen thousand, nine hundred forty-nine".