19990283 has 4 divisors (see below), whose sum is σ = 21166200. Its totient is φ = 18814368.

The previous prime is 19990279. The next prime is 19990291. The reversal of 19990283 is 38209991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19990283 - 2² = 19990279 is a prime.

It is a super-2 number, since 2×19990283² = 799222828840178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19990283.

It is not an unprimeable number, because it can be changed into a prime (19990213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587933 + ... + 587966.

It is an arithmetic number, because the mean of its divisors is an integer number (5291550).

Almost surely, 2^19990283 is an apocalyptic number.

19990283 is a deficient number, since it is larger than the sum of its proper divisors (1175917).

19990283 is a wasteful number, since it uses less digits than its factorization.

19990283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175916.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 19990283 is about 4471.0494293846. The cubic root of 19990283 is about 271.3977945449.

The spelling of 19990283 in words is "nineteen million, nine hundred ninety thousand, two hundred eighty-three".