19990022 has 16 divisors (see below), whose sum is σ = 32398800. Its totient is φ = 9195552.

The previous prime is 19989997. The next prime is 19990031. The reversal of 19990022 is 22009991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7973 + ... + 10175.

It is an arithmetic number, because the mean of its divisors is an integer number (2024925).

Almost surely, 2^19990022 is an apocalyptic number.

19990022 is a deficient number, since it is larger than the sum of its proper divisors (12408778).

19990022 is a wasteful number, since it uses less digits than its factorization.

19990022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 19990022 is about 4471.0202415109. The cubic root of 19990022 is about 271.3966133855.

The spelling of 19990022 in words is "nineteen million, nine hundred ninety thousand, twenty-two".