23217746187 has 6 divisors (see below), whose sum is σ = 30957346812. Its totient is φ = 15478321512.

The previous prime is 23217746171. The next prime is 23217746191. The reversal of 23217746187 is 78164771232.

It is not a de Polignac number, because 23217746187 - 2⁴ = 23217746171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23217746137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 219933 + ... + 307905.

It is an arithmetic number, because the mean of its divisors is an integer number (5159557802).

Almost surely, 2^23217746187 is an apocalyptic number.

23217746187 is a deficient number, since it is larger than the sum of its proper divisors (7739600625).

23217746187 is an frugal number, since it uses more digits than its factorization.

23217746187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175949 (or 87976 counting only the distinct ones).

The product of its digits is 790272, while the sum is 48.

Multiplying 23217746187 by its sum of digits (48), we get a square (1114451816976 = 1055676²).

The spelling of 23217746187 in words is "twenty-three billion, two hundred seventeen million, seven hundred forty-six thousand, one hundred eighty-seven".