18749820386 has 32 divisors (see below), whose sum is σ = 32332576896. Its totient is φ = 8071360000.

The previous prime is 18749820379. The next prime is 18749820449. The reversal of 18749820386 is 68302894781.

It is a super-2 number, since 2×18749820386² (a number of 21 digits) contains 22 as substring.

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, 132335 + ... + 234546.

It is an arithmetic number, because the mean of its divisors is an integer number (1010393028).

Almost surely, 2^18749820386 is an apocalyptic number.

18749820386 is a deficient number, since it is larger than the sum of its proper divisors (13582756510).

18749820386 is a wasteful number, since it uses less digits than its factorization.

18749820386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367018.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 18749820386 in words is "eighteen billion, seven hundred forty-nine million, eight hundred twenty thousand, three hundred eighty-six".