18477742 has 8 divisors (see below), whose sum is σ = 29347056. Its totient is φ = 8695392.

The previous prime is 18477733. The next prime is 18477743. The reversal of 18477742 is 24777481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18477695 and 18477704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18477743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271698 + ... + 271765.

It is an arithmetic number, because the mean of its divisors is an integer number (3668382).

Almost surely, 2^18477742 is an apocalyptic number.

18477742 is a deficient number, since it is larger than the sum of its proper divisors (10869314).

18477742 is a wasteful number, since it uses less digits than its factorization.

18477742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543482.

The product of its digits is 87808, while the sum is 40.

The square root of 18477742 is about 4298.5744148496. The cubic root of 18477742 is about 264.3725132267.

The spelling of 18477742 in words is "eighteen million, four hundred seventy-seven thousand, seven hundred forty-two".