18196541 has 4 divisors (see below), whose sum is σ = 19850784. Its totient is φ = 16542300.

The previous prime is 18196537. The next prime is 18196559. The reversal of 18196541 is 14569181.

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 18196541 - 2² = 18196537 is a prime.

It is a super-2 number, since 2×18196541² = 662228208729362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18196531) 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, 827105 + ... + 827126.

It is an arithmetic number, because the mean of its divisors is an integer number (4962696).

Almost surely, 2^18196541 is an apocalyptic number.

18196541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18196541 is a deficient number, since it is larger than the sum of its proper divisors (1654243).

18196541 is a wasteful number, since it uses less digits than its factorization.

18196541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654242.

The product of its digits is 8640, while the sum is 35.

The square root of 18196541 is about 4265.7403812234. The cubic root of 18196541 is about 263.0245462784.

The spelling of 18196541 in words is "eighteen million, one hundred ninety-six thousand, five hundred forty-one".