18250985772 has 60 divisors (see below), whose sum is σ = 47749733416. Its totient is φ = 6078810240.

The previous prime is 18250985761. The next prime is 18250985807. The reversal of 18250985772 is 27758905281.

18250985772 is a `hidden beast` number, since 1 + 82 + 509 + 8 + 57 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 396468 + ... + 440100.

Almost surely, 2^18250985772 is an apocalyptic number.

18250985772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18250985772 is an abundant number, since it is smaller than the sum of its proper divisors (29498747644).

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

18250985772 is a wasteful number, since it uses less digits than its factorization.

18250985772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44940 (or 44929 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 18250985772 in words is "eighteen billion, two hundred fifty million, nine hundred eighty-five thousand, seven hundred seventy-two".