19890652 has 6 divisors (see below), whose sum is σ = 34808648. Its totient is φ = 9945324.

The previous prime is 19890649. The next prime is 19890671. The reversal of 19890652 is 25609891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2486328 + ... + 2486335.

Almost surely, 2^19890652 is an apocalyptic number.

It is an amenable number.

19890652 is a deficient number, since it is larger than the sum of its proper divisors (14917996).

19890652 is a wasteful number, since it uses less digits than its factorization.

19890652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4972667 (or 4972665 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 19890652 is about 4459.8937207068. The cubic root of 19890652 is about 270.9461637859.

The spelling of 19890652 in words is "nineteen million, eight hundred ninety thousand, six hundred fifty-two".