18851072 has 18 divisors (see below), whose sum is σ = 37629018. Its totient is φ = 9425408.

The previous prime is 18851057. The next prime is 18851083. The reversal of 18851072 is 27015881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18800896 + 50176 = 4336^2 + 224^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36563 + ... + 37074.

It is an arithmetic number, because the mean of its divisors is an integer number (2090501).

Almost surely, 2^18851072 is an apocalyptic number.

It is an amenable number.

18851072 is a deficient number, since it is larger than the sum of its proper divisors (18777946).

18851072 is an frugal number, since it uses more digits than its factorization.

18851072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73653 (or 73639 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 18851072 is about 4341.7821225851. The cubic root of 18851072 is about 266.1411428006.

The spelling of 18851072 in words is "eighteen million, eight hundred fifty-one thousand, seventy-two".