18949350988 has 6 divisors (see below), whose sum is σ = 33161364236. Its totient is φ = 9474675492.

The previous prime is 18949350961. The next prime is 18949351081. The reversal of 18949350988 is 88905394981.

It is a super-2 number, since 2×18949350988² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2368668870 + ... + 2368668877.

Almost surely, 2^18949350988 is an apocalyptic number.

It is an amenable number.

18949350988 is a deficient number, since it is larger than the sum of its proper divisors (14212013248).

18949350988 is a wasteful number, since it uses less digits than its factorization.

18949350988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4737337751 (or 4737337749 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 64.

The spelling of 18949350988 in words is "eighteen billion, nine hundred forty-nine million, three hundred fifty thousand, nine hundred eighty-eight".