19420311 has 4 divisors (see below), whose sum is σ = 25893752. Its totient is φ = 12946872.

The previous prime is 19420283. The next prime is 19420319. The reversal of 19420311 is 11302491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11302491 = 3 ⋅3767497.

It is not a de Polignac number, because 19420311 - 2⁵ = 19420279 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 (19420319) 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 3 ways as a sum of consecutive naturals, for example, 3236716 + ... + 3236721.

It is an arithmetic number, because the mean of its divisors is an integer number (6473438).

Almost surely, 2^19420311 is an apocalyptic number.

19420311 is a deficient number, since it is larger than the sum of its proper divisors (6473441).

19420311 is an equidigital number, since it uses as much as digits as its factorization.

19420311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473440.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 19420311 is about 4406.8481934371. The cubic root of 19420311 is about 268.7934780208.

The spelling of 19420311 in words is "nineteen million, four hundred twenty thousand, three hundred eleven".