18247490 has 8 divisors (see below), whose sum is σ = 32845500. Its totient is φ = 7298992.

The previous prime is 18247483. The next prime is 18247507. The reversal of 18247490 is 9474281.

It can be written as a sum of positive squares in 2 ways, for example, as 16345849 + 1901641 = 4043^2 + 1379^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 18247490.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912365 + ... + 912384.

Almost surely, 2^18247490 is an apocalyptic number.

18247490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18247490 is a deficient number, since it is larger than the sum of its proper divisors (14598010).

18247490 is a wasteful number, since it uses less digits than its factorization.

18247490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824756.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 18247490 is about 4271.7080892776. The cubic root of 18247490 is about 263.2698007639.

The spelling of 18247490 in words is "eighteen million, two hundred forty-seven thousand, four hundred ninety".