19220664 has 16 divisors (see below), whose sum is σ = 48051720. Its totient is φ = 6406880.

The previous prime is 19220633. The next prime is 19220671. The reversal of 19220664 is 46602291.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400407 + ... + 400454.

Almost surely, 2^19220664 is an apocalyptic number.

It is an amenable number.

19220664 is an abundant number, since it is smaller than the sum of its proper divisors (28831056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19220664 is a wasteful number, since it uses less digits than its factorization.

19220664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800870 (or 800866 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 19220664 is about 4384.1377715578. The cubic root of 19220664 is about 267.8692092190.

The spelling of 19220664 in words is "nineteen million, two hundred twenty thousand, six hundred sixty-four".