18001992455 has 16 divisors (see below), whose sum is σ = 22046087520. Its totient is φ = 14106688128.

The previous prime is 18001992451. The next prime is 18001992479. The reversal of 18001992455 is 55429910081.

It is a cyclic number.

It is not a de Polignac number, because 18001992455 - 2² = 18001992451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18001992451) 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, 107036 + ... + 217854.

It is an arithmetic number, because the mean of its divisors is an integer number (1377880470).

Almost surely, 2^18001992455 is an apocalyptic number.

18001992455 is a deficient number, since it is larger than the sum of its proper divisors (4044095065).

18001992455 is a wasteful number, since it uses less digits than its factorization.

18001992455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111490.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 18001992455 in words is "eighteen billion, one million, nine hundred ninety-two thousand, four hundred fifty-five".