18909053834 has 16 divisors (see below), whose sum is σ = 31661673120. Its totient is φ = 8395139760.

The previous prime is 18909053827. The next prime is 18909053909. The reversal of 18909053834 is 43835090981.

It is a super-2 number, since 2×18909053834² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9993269 + ... + 9995160.

It is an arithmetic number, because the mean of its divisors is an integer number (1978854570).

Almost surely, 2^18909053834 is an apocalyptic number.

18909053834 is a deficient number, since it is larger than the sum of its proper divisors (12752619286).

18909053834 is a wasteful number, since it uses less digits than its factorization.

18909053834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19988485.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 18909053834 in words is "eighteen billion, nine hundred nine million, fifty-three thousand, eight hundred thirty-four".