19992245 has 24 divisors (see below), whose sum is σ = 30059064. Its totient is φ = 12652416.

The previous prime is 19992233. The next prime is 19992257. The reversal of 19992245 is 54229991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19992233) and next prime (19992257).

It can be written as a sum of positive squares in 4 ways, for example, as 3678724 + 16313521 = 1918^2 + 4039^2 .

It is not a de Polignac number, because 19992245 - 2⁴ = 19992229 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47 + ... + 6323.

It is an arithmetic number, because the mean of its divisors is an integer number (1252461).

Almost surely, 2^19992245 is an apocalyptic number.

It is an amenable number.

19992245 is a deficient number, since it is larger than the sum of its proper divisors (10066819).

19992245 is a wasteful number, since it uses less digits than its factorization.

19992245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6309 (or 6302 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 19992245 is about 4471.2688355768. The cubic root of 19992245 is about 271.4066732762.

The spelling of 19992245 in words is "nineteen million, nine hundred ninety-two thousand, two hundred forty-five".