19920475 has 6 divisors (see below), whose sum is σ = 24701420. Its totient is φ = 15936360.

The previous prime is 19920473. The next prime is 19920479. The reversal of 19920475 is 57402991.

It is not a de Polignac number, because 19920475 - 2¹ = 19920473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19920473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 398385 + ... + 398434.

Almost surely, 2^19920475 is an apocalyptic number.

19920475 is a deficient number, since it is larger than the sum of its proper divisors (4780945).

19920475 is an equidigital number, since it uses as much as digits as its factorization.

19920475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796829 (or 796824 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 19920475 is about 4463.2359337145. The cubic root of 19920475 is about 271.0815103187.

The spelling of 19920475 in words is "nineteen million, nine hundred twenty thousand, four hundred seventy-five".