22840819 has 2 divisors, whose sum is σ = 22840820. Its totient is φ = 22840818.

The previous prime is 22840789. The next prime is 22840859. The reversal of 22840819 is 91804822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22840819 - 2⁷ = 22840691 is a prime.

It is a super-2 number, since 2×22840819² = 1043406025181522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22840859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11420409 + 11420410.

It is an arithmetic number, because the mean of its divisors is an integer number (11420410).

Almost surely, 2^22840819 is an apocalyptic number.

22840819 is a deficient number, since it is larger than the sum of its proper divisors (1).

22840819 is an equidigital number, since it uses as much as digits as its factorization.

22840819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 22840819 is about 4779.2069425795. The cubic root of 22840819 is about 283.7291067307.

The spelling of 22840819 in words is "twenty-two million, eight hundred forty thousand, eight hundred nineteen".