19999772 has 12 divisors (see below), whose sum is σ = 37691976. Its totient is φ = 9230640.

The previous prime is 19999739. The next prime is 19999789. The reversal of 19999772 is 27799991.

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, 192254 + ... + 192357.

It is an arithmetic number, because the mean of its divisors is an integer number (3140998).

Almost surely, 2^19999772 is an apocalyptic number.

It is an amenable number.

19999772 is a deficient number, since it is larger than the sum of its proper divisors (17692204).

19999772 is a wasteful number, since it uses less digits than its factorization.

19999772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384628 (or 384626 counting only the distinct ones).

The product of its digits is 642978, while the sum is 53.

The square root of 19999772 is about 4472.1104637520. The cubic root of 19999772 is about 271.4407301769.

The spelling of 19999772 in words is "nineteen million, nine hundred ninety-nine thousand, seven hundred seventy-two".