19972244 has 6 divisors (see below), whose sum is σ = 34951434. Its totient is φ = 9986120.

The previous prime is 19972201. The next prime is 19972259. The reversal of 19972244 is 44227991.

It can be written as a sum of positive squares in only one way, i.e., 19802500 + 169744 = 4450^2 + 412^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19972198 and 19972207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2496527 + ... + 2496534.

It is an arithmetic number, because the mean of its divisors is an integer number (5825239).

Almost surely, 2^19972244 is an apocalyptic number.

It is an amenable number.

19972244 is a deficient number, since it is larger than the sum of its proper divisors (14979190).

19972244 is a wasteful number, since it uses less digits than its factorization.

19972244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4993065 (or 4993063 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 19972244 is about 4469.0316624522. The cubic root of 19972244 is about 271.3161345675.

The spelling of 19972244 in words is "nineteen million, nine hundred seventy-two thousand, two hundred forty-four".