23218257964985 has 8 divisors (see below), whose sum is σ = 27909374484096. Its totient is φ = 18542963087920.

The previous prime is 23218257964903. The next prime is 23218257964987. The reversal of 23218257964985 is 58946975281232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23218257964985 - 2²² = 23218253770681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23218257964987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3955407281 + ... + 3955413150.

It is an arithmetic number, because the mean of its divisors is an integer number (3488671810512).

Almost surely, 2^{23218257964985} is an apocalyptic number.

It is an amenable number.

23218257964985 is a deficient number, since it is larger than the sum of its proper divisors (4691116519111).

23218257964985 is an equidigital number, since it uses as much as digits as its factorization.

23218257964985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7910821023.

The product of its digits is 522547200, while the sum is 71.

The spelling of 23218257964985 in words is "twenty-three trillion, two hundred eighteen billion, two hundred fifty-seven million, nine hundred sixty-four thousand, nine hundred eighty-five".