18927972 has 48 divisors (see below), whose sum is σ = 56085120. Its totient is φ = 5407776.

The previous prime is 18927913. The next prime is 18927973. The reversal of 18927972 is 27972981.

It is not an unprimeable number, because it can be changed into a prime (18927973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11763 + ... + 13274.

It is an arithmetic number, because the mean of its divisors is an integer number (1168440).

Almost surely, 2^18927972 is an apocalyptic number.

18927972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18927972 is an abundant number, since it is smaller than the sum of its proper divisors (37157148).

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

18927972 is a wasteful number, since it uses less digits than its factorization.

18927972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25057 (or 25049 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 18927972 is about 4350.6289200528. The cubic root of 18927972 is about 266.5025455395.

The spelling of 18927972 in words is "eighteen million, nine hundred twenty-seven thousand, nine hundred seventy-two".