22478747 has 2 divisors, whose sum is σ = 22478748. Its totient is φ = 22478746.

The previous prime is 22478713. The next prime is 22478749. The reversal of 22478747 is 74787422.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22478747 - 2²² = 18284443 is a prime.

Together with 22478749, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22478749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11239373 + 11239374.

It is an arithmetic number, because the mean of its divisors is an integer number (11239374).

Almost surely, 2^22478747 is an apocalyptic number.

22478747 is a deficient number, since it is larger than the sum of its proper divisors (1).

22478747 is an equidigital number, since it uses as much as digits as its factorization.

22478747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 175616, while the sum is 41.

The square root of 22478747 is about 4741.1756980732. The cubic root of 22478747 is about 282.2218924903.

The spelling of 22478747 in words is "twenty-two million, four hundred seventy-eight thousand, seven hundred forty-seven".