22033987 has 2 divisors, whose sum is σ = 22033988. Its totient is φ = 22033986.

The previous prime is 22033943. The next prime is 22034003. The reversal of 22033987 is 78933022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22033987 is a prime.

It is not a weakly prime, because it can be changed into another prime (22033937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11016993 + 11016994.

It is an arithmetic number, because the mean of its divisors is an integer number (11016994).

Almost surely, 2^22033987 is an apocalyptic number.

22033987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22033987 is an equidigital number, since it uses as much as digits as its factorization.

22033987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 22033987 is about 4694.0373880062. The cubic root of 22033987 is about 280.3481511143.

The spelling of 22033987 in words is "twenty-two million, thirty-three thousand, nine hundred eighty-seven".