18755121 has 40 divisors (see below), whose sum is σ = 31952320. Its totient is φ = 9583200.

The previous prime is 18755119. The next prime is 18755183. The reversal of 18755121 is 12155781.

18755121 = 330² + 331² + ... + 451².

It is not a de Polignac number, because 18755121 - 2¹ = 18755119 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (18755101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 307431 + ... + 307491.

It is an arithmetic number, because the mean of its divisors is an integer number (798808).

Almost surely, 2^18755121 is an apocalyptic number.

18755121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18755121 is a deficient number, since it is larger than the sum of its proper divisors (13197199).

18755121 is an frugal number, since it uses more digits than its factorization.

18755121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 82 counting only the distinct ones).

The product of its digits is 2800, while the sum is 30.

The square root of 18755121 is about 4330.7183006979. The cubic root of 18755121 is about 265.6888262031.

It can be divided in two parts, 1875 and 5121, that added together give a palindrome (6996).

The spelling of 18755121 in words is "eighteen million, seven hundred fifty-five thousand, one hundred twenty-one".