20222987 has 2 divisors, whose sum is σ = 20222988. Its totient is φ = 20222986.

The previous prime is 20222953. The next prime is 20223023. The reversal of 20222987 is 78922202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20222987 - 2⁸ = 20222731 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20222087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111493 + 10111494.

It is an arithmetic number, because the mean of its divisors is an integer number (10111494).

Almost surely, 2^20222987 is an apocalyptic number.

20222987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222987 is an equidigital number, since it uses as much as digits as its factorization.

20222987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20222987 is about 4496.9975539242. The cubic root of 20222987 is about 272.4468352922.

The spelling of 20222987 in words is "twenty million, two hundred twenty-two thousand, nine hundred eighty-seven".