18290436 has 24 divisors (see below), whose sum is σ = 45188640. Its totient is φ = 5738112.

The previous prime is 18290429. The next prime is 18290443. The reversal of 18290436 is 63409281.

It is an interprime number because it is at equal distance from previous prime (18290429) and next prime (18290443).

It is a junction number, because it is equal to n+sod(n) for n = 18290397 and 18290406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44626 + ... + 45033.

It is an arithmetic number, because the mean of its divisors is an integer number (1882860).

Almost surely, 2^18290436 is an apocalyptic number.

It is an amenable number.

18290436 is an abundant number, since it is smaller than the sum of its proper divisors (26898204).

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

18290436 is a wasteful number, since it uses less digits than its factorization.

18290436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89683 (or 89681 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 18290436 is about 4276.7319298736. The cubic root of 18290436 is about 263.4761766632.

The spelling of 18290436 in words is "eighteen million, two hundred ninety thousand, four hundred thirty-six".