18851489074 has 24 divisors (see below), whose sum is σ = 32769224208. Its totient is φ = 8064805440.

The previous prime is 18851488979. The next prime is 18851489093. The reversal of 18851489074 is 47098415881.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1476144 + ... + 1488859.

It is an arithmetic number, because the mean of its divisors is an integer number (1365384342).

Almost surely, 2^18851489074 is an apocalyptic number.

18851489074 is a deficient number, since it is larger than the sum of its proper divisors (13917735134).

18851489074 is a wasteful number, since it uses less digits than its factorization.

18851489074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965050 (or 2965033 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 55.

The spelling of 18851489074 in words is "eighteen billion, eight hundred fifty-one million, four hundred eighty-nine thousand, seventy-four".