19992744 has 40 divisors (see below), whose sum is σ = 56000010. Its totient is φ = 6664032.

The previous prime is 19992701. The next prime is 19992757. The reversal of 19992744 is 44729991.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19448100 + 544644 = 4410^2 + 738^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19992744.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14779 + ... + 16074.

Almost surely, 2^19992744 is an apocalyptic number.

It is an amenable number.

19992744 is an abundant number, since it is smaller than the sum of its proper divisors (36007266).

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

19992744 is a wasteful number, since it uses less digits than its factorization.

19992744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30871 (or 30858 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 19992744 is about 4471.3246359440. The cubic root of 19992744 is about 271.4089313318.

It can be divided in two parts, 19992 and 744, that added together give a 4-th power (20736 = 12⁴).

The spelling of 19992744 in words is "nineteen million, nine hundred ninety-two thousand, seven hundred forty-four".