19422811 has 4 divisors (see below), whose sum is σ = 19454224. Its totient is φ = 19391400.

The previous prime is 19422803. The next prime is 19422829. The reversal of 19422811 is 11822491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19422811 - 2³ = 19422803 is a prime.

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 19422811.

It is not an unprimeable number, because it can be changed into a prime (19422311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14760 + ... + 16021.

It is an arithmetic number, because the mean of its divisors is an integer number (4863556).

Almost surely, 2^19422811 is an apocalyptic number.

19422811 is a deficient number, since it is larger than the sum of its proper divisors (31413).

19422811 is an equidigital number, since it uses as much as digits as its factorization.

19422811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31412.

The product of its digits is 1152, while the sum is 28.

The square root of 19422811 is about 4407.1318337440. The cubic root of 19422811 is about 268.8050115618.

It can be divided in two parts, 1942 and 2811, that added together give a triangular number (4753 = T₉₇).

The spelling of 19422811 in words is "nineteen million, four hundred twenty-two thousand, eight hundred eleven".