22794781 has 2 divisors, whose sum is σ = 22794782. Its totient is φ = 22794780.

The previous prime is 22794767. The next prime is 22794803. The reversal of 22794781 is 18749722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17347225 + 5447556 = 4165^2 + 2334^2 .

It is a cyclic number.

It is not a de Polignac number, because 22794781 - 2²¹ = 20697629 is a prime.

It is a super-2 number, since 2×22794781² = 1039204081675922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22794721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11397390 + 11397391.

It is an arithmetic number, because the mean of its divisors is an integer number (11397391).

Almost surely, 2^22794781 is an apocalyptic number.

It is an amenable number.

22794781 is a deficient number, since it is larger than the sum of its proper divisors (1).

22794781 is an equidigital number, since it uses as much as digits as its factorization.

22794781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 22794781 is about 4774.3880236110. The cubic root of 22794781 is about 283.5383501938.

The spelling of 22794781 in words is "twenty-two million, seven hundred ninety-four thousand, seven hundred eighty-one".