18893772 has 18 divisors (see below), whose sum is σ = 47759348. Its totient is φ = 6297912.

The previous prime is 18893731. The next prime is 18893779. The reversal of 18893772 is 27739881.

Added to its reverse (27739881) it gives a triangular number (46633653 = T₉₆₅₇).

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (18893779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 262378 + ... + 262449.

Almost surely, 2^18893772 is an apocalyptic number.

18893772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18893772 is an abundant number, since it is smaller than the sum of its proper divisors (28865576).

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

18893772 is a wasteful number, since it uses less digits than its factorization.

18893772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524837 (or 524832 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 18893772 is about 4346.6966767880. The cubic root of 18893772 is about 266.3419387575.

Adding to 18893772 its reverse (27739881), we get a triangular number (46633653 = T₉₆₅₇).

The spelling of 18893772 in words is "eighteen million, eight hundred ninety-three thousand, seven hundred seventy-two".