18913186950 has 48 divisors (see below), whose sum is σ = 53605378560. Its totient is φ = 4323013920.

The previous prime is 18913186937. The next prime is 18913186961. The reversal of 18913186950 is 5968131981.

It is a junction number, because it is equal to n+sod(n) for n = 18913186893 and 18913186902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9005230 + ... + 9007329.

It is an arithmetic number, because the mean of its divisors is an integer number (1116778720).

Almost surely, 2^18913186950 is an apocalyptic number.

18913186950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18913186950 is an abundant number, since it is smaller than the sum of its proper divisors (34692191610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18913186950 is a wasteful number, since it uses less digits than its factorization.

18913186950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18012581 (or 18012576 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 51.

The spelling of 18913186950 in words is "eighteen billion, nine hundred thirteen million, one hundred eighty-six thousand, nine hundred fifty".