18972042 has 16 divisors (see below), whose sum is σ = 38320992. Its totient is φ = 6261200.

The previous prime is 18972029. The next prime is 18972047. The reversal of 18972042 is 24027981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18971994 and 18972012.

It is not an unprimeable number, because it can be changed into a prime (18972047) 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, 15048 + ... + 16259.

It is an arithmetic number, because the mean of its divisors is an integer number (2395062).

Almost surely, 2^18972042 is an apocalyptic number.

18972042 is an abundant number, since it is smaller than the sum of its proper divisors (19348950).

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

18972042 is a wasteful number, since it uses less digits than its factorization.

18972042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31413.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18972042 is about 4355.6907603731. The cubic root of 18972042 is about 266.7092178627.

The spelling of 18972042 in words is "eighteen million, nine hundred seventy-two thousand, forty-two".