18988541 has 32 divisors (see below), whose sum is σ = 24167808. Its totient is φ = 14653440.

The previous prime is 18988483. The next prime is 18988573. The reversal of 18988541 is 14588981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18988541 is a prime.

It is a Duffinian number.

18988541 is a modest number, since divided by 8541 gives 1898 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18988492 and 18988501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18984541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177410 + ... + 177516.

It is an arithmetic number, because the mean of its divisors is an integer number (755244).

Almost surely, 2^18988541 is an apocalyptic number.

18988541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18988541 is a deficient number, since it is larger than the sum of its proper divisors (5179267).

18988541 is a wasteful number, since it uses less digits than its factorization.

18988541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221.

The product of its digits is 92160, while the sum is 44.

The square root of 18988541 is about 4357.5843078476. The cubic root of 18988541 is about 266.7865098483.

The spelling of 18988541 in words is "eighteen million, nine hundred eighty-eight thousand, five hundred forty-one".