19974253 has 8 divisors (see below), whose sum is σ = 21545496. Its totient is φ = 18408000.

The previous prime is 19974239. The next prime is 19974259. The reversal of 19974253 is 35247991.

It can be written as a sum of positive squares in 4 ways, for example, as 100489 + 19873764 = 317^2 + 4458^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19974253 - 2⁵ = 19974221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19974259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14703 + ... + 16003.

It is an arithmetic number, because the mean of its divisors is an integer number (2693187).

Almost surely, 2^19974253 is an apocalyptic number.

19974253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19974253 is a deficient number, since it is larger than the sum of its proper divisors (1571243).

19974253 is a wasteful number, since it uses less digits than its factorization.

19974253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495.

The product of its digits is 68040, while the sum is 40.

The square root of 19974253 is about 4469.2564258498. The cubic root of 19974253 is about 271.3252314562.

The spelling of 19974253 in words is "nineteen million, nine hundred seventy-four thousand, two hundred fifty-three".