18123061 has 4 divisors (see below), whose sum is σ = 19770624. Its totient is φ = 16475500.

The previous prime is 18123047. The next prime is 18123073. The reversal of 18123061 is 16032181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18123061 - 2⁹ = 18122549 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 (18123041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823765 + ... + 823786.

It is an arithmetic number, because the mean of its divisors is an integer number (4942656).

Almost surely, 2^18123061 is an apocalyptic number.

18123061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18123061 is a deficient number, since it is larger than the sum of its proper divisors (1647563).

18123061 is a wasteful number, since it uses less digits than its factorization.

18123061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647562.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 18123061 is about 4257.1188613897. The cubic root of 18123061 is about 262.6700262038.

The spelling of 18123061 in words is "eighteen million, one hundred twenty-three thousand, sixty-one".