21418896111 has 4 divisors (see below), whose sum is σ = 28558528152. Its totient is φ = 14279264072.

The previous prime is 21418896101. The next prime is 21418896143. The reversal of 21418896111 is 11169881412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21418896111 - 2⁷ = 21418895983 is a prime.

It is a super-2 number, since 2×21418896111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21418896101) 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, 3569816016 + ... + 3569816021.

It is an arithmetic number, because the mean of its divisors is an integer number (7139632038).

Almost surely, 2^21418896111 is an apocalyptic number.

21418896111 is a deficient number, since it is larger than the sum of its proper divisors (7139632041).

21418896111 is an equidigital number, since it uses as much as digits as its factorization.

21418896111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7139632040.

The product of its digits is 27648, while the sum is 42.

The spelling of 21418896111 in words is "twenty-one billion, four hundred eighteen million, eight hundred ninety-six thousand, one hundred eleven".