18861101 has 8 divisors (see below), whose sum is σ = 21633984. Its totient is φ = 16107840.

The previous prime is 18861097. The next prime is 18861121. The reversal of 18861101 is 10116881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18861101 - 2² = 18861097 is a prime.

It is a super-2 number, since 2×18861101² = 711482261864402, 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 (18861121) 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, 2780 + ... + 6741.

It is an arithmetic number, because the mean of its divisors is an integer number (2704248).

Almost surely, 2^18861101 is an apocalyptic number.

It is an amenable number.

18861101 is a deficient number, since it is larger than the sum of its proper divisors (2772883).

18861101 is an equidigital number, since it uses as much as digits as its factorization.

18861101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9811.

The product of its (nonzero) digits is 384, while the sum is 26.

The square root of 18861101 is about 4342.9369095118. The cubic root of 18861101 is about 266.1883312103.

Adding to 18861101 its reverse (10116881), we get a palindrome (28977982).

The spelling of 18861101 in words is "eighteen million, eight hundred sixty-one thousand, one hundred one".