23187945 has 16 divisors (see below), whose sum is σ = 40473792. Its totient is φ = 11242560.

The previous prime is 23187929. The next prime is 23188021. The reversal of 23187945 is 54978132.

It is not a de Polignac number, because 23187945 - 2⁴ = 23187929 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70102 + ... + 70431.

It is an arithmetic number, because the mean of its divisors is an integer number (2529612).

Almost surely, 2^23187945 is an apocalyptic number.

It is an amenable number.

23187945 is a deficient number, since it is larger than the sum of its proper divisors (17285847).

23187945 is a wasteful number, since it uses less digits than its factorization.

23187945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140552.

The product of its digits is 60480, while the sum is 39.

The square root of 23187945 is about 4815.3862773406. The cubic root of 23187945 is about 285.1592215878.

The spelling of 23187945 in words is "twenty-three million, one hundred eighty-seven thousand, nine hundred forty-five".