19973219 has 8 divisors (see below), whose sum is σ = 22901088. Its totient is φ = 17064000.

The previous prime is 19973201. The next prime is 19973221. The reversal of 19973219 is 91237991.

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

It is a cyclic number.

It is not a de Polignac number, because 19973219 - 2⁸ = 19972963 is a prime.

It is a super-2 number, since 2×19973219² = 797858954443922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19973119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2282 + ... + 6719.

It is an arithmetic number, because the mean of its divisors is an integer number (2862636).

Almost surely, 2^19973219 is an apocalyptic number.

19973219 is a deficient number, since it is larger than the sum of its proper divisors (2927869).

19973219 is an equidigital number, since it uses as much as digits as its factorization.

19973219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9325.

The product of its digits is 30618, while the sum is 41.

The square root of 19973219 is about 4469.1407451545. The cubic root of 19973219 is about 271.3205495100.

The spelling of 19973219 in words is "nineteen million, nine hundred seventy-three thousand, two hundred nineteen".