18909052 has 12 divisors (see below), whose sum is σ = 33210576. Its totient is φ = 9420320.

The previous prime is 18909043. The next prime is 18909053. The reversal of 18909052 is 25090981.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 18908999 and 18909017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18909053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7288 + ... + 9535.

It is an arithmetic number, because the mean of its divisors is an integer number (2767548).

Almost surely, 2^18909052 is an apocalyptic number.

It is an amenable number.

18909052 is a deficient number, since it is larger than the sum of its proper divisors (14301524).

18909052 is a wasteful number, since it uses less digits than its factorization.

18909052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17108 (or 17106 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 18909052 is about 4348.4539781398. The cubic root of 18909052 is about 266.4137191695.

The spelling of 18909052 in words is "eighteen million, nine hundred nine thousand, fifty-two".