18645953090 has 32 divisors (see below), whose sum is σ = 35560010880. Its totient is φ = 7015106304.

The previous prime is 18645953059. The next prime is 18645953093. The reversal of 18645953090 is 9035954681.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18645953093) 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, 233699 + ... + 303161.

It is an arithmetic number, because the mean of its divisors is an integer number (1111250340).

Almost surely, 2^18645953090 is an apocalyptic number.

18645953090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18645953090 is a deficient number, since it is larger than the sum of its proper divisors (16914057790).

18645953090 is a wasteful number, since it uses less digits than its factorization.

18645953090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71066.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 18645953090 in words is "eighteen billion, six hundred forty-five million, nine hundred fifty-three thousand, ninety".