18621141 has 16 divisors (see below), whose sum is σ = 30955008. Its totient is φ = 9673200.

The previous prime is 18621139. The next prime is 18621143. The reversal of 18621141 is 14112681.

It is an interprime number because it is at equal distance from previous prime (18621139) and next prime (18621143).

It is not a de Polignac number, because 18621141 - 2¹ = 18621139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18621143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40075 + ... + 40536.

It is an arithmetic number, because the mean of its divisors is an integer number (1934688).

Almost surely, 2^18621141 is an apocalyptic number.

18621141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18621141 is a deficient number, since it is larger than the sum of its proper divisors (12333867).

18621141 is a wasteful number, since it uses less digits than its factorization.

18621141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80632.

The product of its digits is 384, while the sum is 24.

The square root of 18621141 is about 4315.2220105112. Note that the first 3 decimals coincide. The cubic root of 18621141 is about 265.0546511232.

It can be divided in two parts, 1862 and 1141, that added together give a palindrome (3003).

The spelling of 18621141 in words is "eighteen million, six hundred twenty-one thousand, one hundred forty-one".