18949394250 has 192 divisors, whose sum is σ = 54948741120. Its totient is φ = 4694976000.

The previous prime is 18949394231. The next prime is 18949394377. The reversal of 18949394250 is 5249394981.

18949394250 is a `hidden beast` number, since 18 + 9 + 493 + 94 + 2 + 50 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3018615 + ... + 3024885.

It is an arithmetic number, because the mean of its divisors is an integer number (286191360).

Almost surely, 2^18949394250 is an apocalyptic number.

18949394250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18949394250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27474370560).

18949394250 is an abundant number, since it is smaller than the sum of its proper divisors (35999346870).

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

18949394250 is a wasteful number, since it uses less digits than its factorization.

18949394250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6390 (or 6377 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 18949394250 in words is "eighteen billion, nine hundred forty-nine million, three hundred ninety-four thousand, two hundred fifty".