23509473 has 16 divisors (see below), whose sum is σ = 35226240. Its totient is φ = 13837824.

The previous prime is 23509471. The next prime is 23509477. The reversal of 23509473 is 37490532.

It is a happy number.

It is not a de Polignac number, because 23509473 - 2¹ = 23509471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23509471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12208 + ... + 14001.

It is an arithmetic number, because the mean of its divisors is an integer number (2201640).

Almost surely, 2^23509473 is an apocalyptic number.

23509473 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23509473 is a deficient number, since it is larger than the sum of its proper divisors (11716767).

23509473 is a wasteful number, since it uses less digits than its factorization.

23509473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26248.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 23509473 is about 4848.6568243174. The cubic root of 23509473 is about 286.4711982474.

The spelling of 23509473 in words is "twenty-three million, five hundred nine thousand, four hundred seventy-three".