18522061 has 16 divisors (see below), whose sum is σ = 20680704. Its totient is φ = 16498944.

The previous prime is 18522059. The next prime is 18522073. The reversal of 18522061 is 16022581.

It is a cyclic number.

It is not a de Polignac number, because 18522061 - 2¹ = 18522059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18522011) 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, 49471 + ... + 49843.

It is an arithmetic number, because the mean of its divisors is an integer number (1292544).

Almost surely, 2^18522061 is an apocalyptic number.

It is an amenable number.

18522061 is a deficient number, since it is larger than the sum of its proper divisors (2158643).

18522061 is a wasteful number, since it uses less digits than its factorization.

18522061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 18522061 is about 4303.7264085906. The cubic root of 18522061 is about 264.5837109356.

The spelling of 18522061 in words is "eighteen million, five hundred twenty-two thousand, sixty-one".