18272701 has 2 divisors, whose sum is σ = 18272702. Its totient is φ = 18272700.

The previous prime is 18272693. The next prime is 18272731. The reversal of 18272701 is 10727281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18267076 + 5625 = 4274^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 18272701 - 2³ = 18272693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18272701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18272731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9136350 + 9136351.

It is an arithmetic number, because the mean of its divisors is an integer number (9136351).

Almost surely, 2^18272701 is an apocalyptic number.

It is an amenable number.

18272701 is a deficient number, since it is larger than the sum of its proper divisors (1).

18272701 is an equidigital number, since it uses as much as digits as its factorization.

18272701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 18272701 is about 4274.6579980157. The cubic root of 18272701 is about 263.3909907753.

Adding to 18272701 its reverse (10727281), we get a palindrome (28999982).

The spelling of 18272701 in words is "eighteen million, two hundred seventy-two thousand, seven hundred one".