18214909625 has 16 divisors (see below), whose sum is σ = 24798773376. Its totient is φ = 13247206000.

The previous prime is 18214909621. The next prime is 18214909663. The reversal of 18214909625 is 52690941281.

It is a happy number.

It is not a de Polignac number, because 18214909625 - 2² = 18214909621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18214909625.

It is not an unprimeable number, because it can be changed into a prime (18214909621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6622229 + ... + 6624978.

It is an arithmetic number, because the mean of its divisors is an integer number (1549923336).

Almost surely, 2^18214909625 is an apocalyptic number.

It is an amenable number.

18214909625 is a deficient number, since it is larger than the sum of its proper divisors (6583863751).

18214909625 is a wasteful number, since it uses less digits than its factorization.

18214909625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13247233 (or 13247223 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 18214909625 in words is "eighteen billion, two hundred fourteen million, nine hundred nine thousand, six hundred twenty-five".