18850356 has 144 divisors (see below), whose sum is σ = 59637760. Its totient is φ = 4898880.

The previous prime is 18850343. The next prime is 18850357. The reversal of 18850356 is 65305881.

18850356 = 180² + 181² + ... + 396².

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18850356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18850357) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148365 + ... + 148491.

Almost surely, 2^18850356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18850356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29818880).

18850356 is an abundant number, since it is smaller than the sum of its proper divisors (40787404).

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

18850356 is a wasteful number, since it uses less digits than its factorization.

18850356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 18850356 is about 4341.6996671810. The cubic root of 18850356 is about 266.1377732403.

The spelling of 18850356 in words is "eighteen million, eight hundred fifty thousand, three hundred fifty-six".