18819542 has 32 divisors (see below), whose sum is σ = 33705984. Its totient is φ = 7711200.

The previous prime is 18819529. The next prime is 18819547. The reversal of 18819542 is 24591881.

It is a super-2 number, since 2×18819542² = 708350322179528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18819496 and 18819505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18819547) 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, 44492 + ... + 44912.

It is an arithmetic number, because the mean of its divisors is an integer number (1053312).

Almost surely, 2^18819542 is an apocalyptic number.

18819542 is a deficient number, since it is larger than the sum of its proper divisors (14886442).

18819542 is a wasteful number, since it uses less digits than its factorization.

18819542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its digits is 23040, while the sum is 38.

The square root of 18819542 is about 4338.1496055346. The cubic root of 18819542 is about 265.9926788646.

The spelling of 18819542 in words is "eighteen million, eight hundred nineteen thousand, five hundred forty-two".