18121741 has 8 divisors (see below), whose sum is σ = 19800000. Its totient is φ = 16448640.

The previous prime is 18121721. The next prime is 18121759. The reversal of 18121741 is 14712181.

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 18121741 - 2⁵ = 18121709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18121721) 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, 13080 + ... + 14398.

It is an arithmetic number, because the mean of its divisors is an integer number (2475000).

Almost surely, 2^18121741 is an apocalyptic number.

18121741 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18121741 is a deficient number, since it is larger than the sum of its proper divisors (1678259).

18121741 is a wasteful number, since it uses less digits than its factorization.

18121741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579.

The product of its digits is 448, while the sum is 25.

The square root of 18121741 is about 4256.9638241357. The cubic root of 18121741 is about 262.6636488254.

It can be divided in two parts, 1812 and 1741, that added together give a palindrome (3553).

The spelling of 18121741 in words is "eighteen million, one hundred twenty-one thousand, seven hundred forty-one".