23191650009 has 18 divisors (see below), whose sum is σ = 36821271578. Its totient is φ = 14055544800.

The previous prime is 23191649981. The next prime is 23191650011. The reversal of 23191650009 is 90005619132.

It can be written as a sum of positive squares in only one way, i.e., 22644230400 + 547419609 = 150480^2 + 23397^2 .

It is not a de Polignac number, because 23191650009 - 2⁷ = 23191649881 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23191650409) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10647052 + ... + 10649229.

Almost surely, 2^23191650009 is an apocalyptic number.

It is an amenable number.

23191650009 is a deficient number, since it is larger than the sum of its proper divisors (13629621569).

23191650009 is a wasteful number, since it uses less digits than its factorization.

23191650009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21296309 (or 21296295 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The spelling of 23191650009 in words is "twenty-three billion, one hundred ninety-one million, six hundred fifty thousand, nine".