18905897738 has 32 divisors (see below), whose sum is σ = 34924310400. Its totient is φ = 7474731840.

The previous prime is 18905897729. The next prime is 18905897741. The reversal of 18905897738 is 83779850981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278648 + ... + 339788.

It is an arithmetic number, because the mean of its divisors is an integer number (1091384700).

Almost surely, 2^18905897738 is an apocalyptic number.

18905897738 is a deficient number, since it is larger than the sum of its proper divisors (16018412662).

18905897738 is a wasteful number, since it uses less digits than its factorization.

18905897738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62862.

The product of its (nonzero) digits is 30481920, while the sum is 65.

The spelling of 18905897738 in words is "eighteen billion, nine hundred five million, eight hundred ninety-seven thousand, seven hundred thirty-eight".