18572105 has 16 divisors (see below), whose sum is σ = 22755600. Its totient is φ = 14548992.

The previous prime is 18572089. The next prime is 18572107. The reversal of 18572105 is 50127581.

It can be written as a sum of positive squares in 8 ways, for example, as 4624 + 18567481 = 68^2 + 4309^2 .

It is a cyclic number.

It is not a de Polignac number, because 18572105 - 2⁴ = 18572089 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 72137 + ... + 72393.

It is an arithmetic number, because the mean of its divisors is an integer number (1422225).

Almost surely, 2^18572105 is an apocalyptic number.

It is an amenable number.

18572105 is a deficient number, since it is larger than the sum of its proper divisors (4183495).

18572105 is a wasteful number, since it uses less digits than its factorization.

18572105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 18572105 is about 4309.5365180028. The cubic root of 18572105 is about 264.8217859559.

Adding to 18572105 its reverse (50127581), we get a palindrome (68699686).

The spelling of 18572105 in words is "eighteen million, five hundred seventy-two thousand, one hundred five".