18472397 has 8 divisors (see below), whose sum is σ = 18774336. Its totient is φ = 18172512.

The previous prime is 18472393. The next prime is 18472411. The reversal of 18472397 is 79327481.

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

It is a cyclic number.

It is not a de Polignac number, because 18472397 - 2² = 18472393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18472393) 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, 37688 + ... + 38174.

It is an arithmetic number, because the mean of its divisors is an integer number (2346792).

Almost surely, 2^18472397 is an apocalyptic number.

It is an amenable number.

18472397 is a deficient number, since it is larger than the sum of its proper divisors (301939).

18472397 is an equidigital number, since it uses as much as digits as its factorization.

18472397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027.

The product of its digits is 84672, while the sum is 41.

The square root of 18472397 is about 4297.9526521357. The cubic root of 18472397 is about 264.3470193586.

The spelling of 18472397 in words is "eighteen million, four hundred seventy-two thousand, three hundred ninety-seven".