18894642 has 32 divisors (see below), whose sum is σ = 41802432. Its totient is φ = 5655744.

The previous prime is 18894613. The next prime is 18894643. The reversal of 18894642 is 24649881.

It is a junction number, because it is equal to n+sod(n) for n = 18894594 and 18894603.

It is not an unprimeable number, because it can be changed into a prime (18894643) 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, 388 + ... + 6159.

It is an arithmetic number, because the mean of its divisors is an integer number (1306326).

Almost surely, 2^18894642 is an apocalyptic number.

18894642 is an abundant number, since it is smaller than the sum of its proper divisors (22907790).

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

18894642 is a wasteful number, since it uses less digits than its factorization.

18894642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6602.

The product of its digits is 110592, while the sum is 42.

The square root of 18894642 is about 4346.7967516322. The cubic root of 18894642 is about 266.3460267700.

It can be divided in two parts, 188 and 94642, that added together give a triangular number (94830 = T₄₃₅).

The spelling of 18894642 in words is "eighteen million, eight hundred ninety-four thousand, six hundred forty-two".