19973475 has 18 divisors (see below), whose sum is σ = 35775116. Its totient is φ = 10652400.

The previous prime is 19973461. The next prime is 19973479. The reversal of 19973475 is 57437991.

It is not a de Polignac number, because 19973475 - 2⁷ = 19973347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19973475.

It is not an unprimeable number, because it can be changed into a prime (19973479) 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 17 ways as a sum of consecutive naturals, for example, 44161 + ... + 44610.

Almost surely, 2^19973475 is an apocalyptic number.

19973475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19973475 is a deficient number, since it is larger than the sum of its proper divisors (15801641).

19973475 is a wasteful number, since it uses less digits than its factorization.

19973475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88787 (or 88779 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 19973475 is about 4469.1693859150. The cubic root of 19973475 is about 271.3217086916.

It can be divided in two parts, 199734 and 75, that added together give a square (199809 = 447²).

The spelling of 19973475 in words is "nineteen million, nine hundred seventy-three thousand, four hundred seventy-five".