18941772 has 24 divisors (see below), whose sum is σ = 44655856. Its totient is φ = 6248448.

The previous prime is 18941761. The next prime is 18941777. The reversal of 18941772 is 27714981.

It is a self number, because there is not a number n which added to its sum of digits gives 18941772.

It is not an unprimeable number, because it can be changed into a prime (18941777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6973 + ... + 9300.

Almost surely, 2^18941772 is an apocalyptic number.

18941772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18941772 is an abundant number, since it is smaller than the sum of its proper divisors (25714084).

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

18941772 is a wasteful number, since it uses less digits than its factorization.

18941772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16377 (or 16375 counting only the distinct ones).

The product of its digits is 28224, while the sum is 39.

The square root of 18941772 is about 4352.2146086791. The cubic root of 18941772 is about 266.5672970036.

The spelling of 18941772 in words is "eighteen million, nine hundred forty-one thousand, seven hundred seventy-two".