22820947 has 2 divisors, whose sum is σ = 22820948. Its totient is φ = 22820946.

The previous prime is 22820939. The next prime is 22820951. The reversal of 22820947 is 74902822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22820947 - 2³ = 22820939 is a prime.

It is not a weakly prime, because it can be changed into another prime (22820977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11410473 + 11410474.

It is an arithmetic number, because the mean of its divisors is an integer number (11410474).

Almost surely, 2^22820947 is an apocalyptic number.

22820947 is a deficient number, since it is larger than the sum of its proper divisors (1).

22820947 is an equidigital number, since it uses as much as digits as its factorization.

22820947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 22820947 is about 4777.1274841687. The cubic root of 22820947 is about 283.6467993970.

The spelling of 22820947 in words is "twenty-two million, eight hundred twenty thousand, nine hundred forty-seven".