22111819 has 2 divisors, whose sum is σ = 22111820. Its totient is φ = 22111818.

The previous prime is 22111811. The next prime is 22111823. The reversal of 22111819 is 91811122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22111819 - 2³ = 22111811 is a prime.

It is a super-2 number, since 2×22111819² = 977865078977522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22111793 and 22111802.

It is not a weakly prime, because it can be changed into another prime (22111811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055909 + 11055910.

It is an arithmetic number, because the mean of its divisors is an integer number (11055910).

Almost surely, 2^22111819 is an apocalyptic number.

22111819 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111819 is an equidigital number, since it uses as much as digits as its factorization.

22111819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 25.

The square root of 22111819 is about 4702.3205973221. The cubic root of 22111819 is about 280.6778601752.

The spelling of 22111819 in words is "twenty-two million, one hundred eleven thousand, eight hundred nineteen".