223918204917 has 12 divisors (see below), whose sum is σ = 328166625920. Its totient is φ = 135708002760.

The previous prime is 223918204897. The next prime is 223918204963. The reversal of 223918204917 is 719402819322.

It is not a de Polignac number, because 223918204917 - 2⁸ = 223918204661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223918224917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308426917 + ... + 308427642.

Almost surely, 2^223918204917 is an apocalyptic number.

It is an amenable number.

223918204917 is a deficient number, since it is larger than the sum of its proper divisors (104248421003).

223918204917 is a wasteful number, since it uses less digits than its factorization.

223918204917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616854584 (or 616854573 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 223918204917 in words is "two hundred twenty-three billion, nine hundred eighteen million, two hundred four thousand, nine hundred seventeen".