18572147 has 8 divisors (see below), whose sum is σ = 20321280. Its totient is φ = 16833160.

The previous prime is 18572111. The next prime is 18572153. The reversal of 18572147 is 74127581.

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 18572147 - 2⁶ = 18572083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18572107) 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, 1598 + ... + 6300.

It is an arithmetic number, because the mean of its divisors is an integer number (2540160).

Almost surely, 2^18572147 is an apocalyptic number.

18572147 is a deficient number, since it is larger than the sum of its proper divisors (1749133).

18572147 is a wasteful number, since it uses less digits than its factorization.

18572147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5073.

The product of its digits is 15680, while the sum is 35.

The square root of 18572147 is about 4309.5413909139. The cubic root of 18572147 is about 264.8219855834.

It can be divided in two parts, 1857 and 2147, that added together give a palindrome (4004).

The spelling of 18572147 in words is "eighteen million, five hundred seventy-two thousand, one hundred forty-seven".