18236742 has 16 divisors (see below), whose sum is σ = 37650432. Its totient is φ = 5882760.

The previous prime is 18236741. The next prime is 18236749. The reversal of 18236742 is 24763281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18236741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48838 + ... + 49209.

It is an arithmetic number, because the mean of its divisors is an integer number (2353152).

Almost surely, 2^18236742 is an apocalyptic number.

18236742 is an abundant number, since it is smaller than the sum of its proper divisors (19413690).

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

18236742 is a wasteful number, since it uses less digits than its factorization.

18236742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98083.

The product of its digits is 16128, while the sum is 33.

The square root of 18236742 is about 4270.4498592069. The cubic root of 18236742 is about 263.2181008760.

The spelling of 18236742 in words is "eighteen million, two hundred thirty-six thousand, seven hundred forty-two".