19994772 has 48 divisors (see below), whose sum is σ = 53860352. Its totient is φ = 5654880.

The previous prime is 19994761. The next prime is 19994789. The reversal of 19994772 is 27749991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7497 + ... + 9807.

Almost surely, 2^19994772 is an apocalyptic number.

19994772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19994772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26930176).

19994772 is an abundant number, since it is smaller than the sum of its proper divisors (33865580).

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

19994772 is a wasteful number, since it uses less digits than its factorization.

19994772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428 (or 2426 counting only the distinct ones).

The product of its digits is 285768, while the sum is 48.

The square root of 19994772 is about 4471.5514086277. The cubic root of 19994772 is about 271.4181079728.

The spelling of 19994772 in words is "nineteen million, nine hundred ninety-four thousand, seven hundred seventy-two".