19206442 has 4 divisors (see below), whose sum is σ = 28809666. Its totient is φ = 9603220.

The previous prime is 19206437. The next prime is 19206487. The reversal of 19206442 is 24460291.

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

It can be written as a sum of positive squares in only one way, i.e., 18224361 + 982081 = 4269^2 + 991^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19206442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4801609 + ... + 4801612.

Almost surely, 2^19206442 is an apocalyptic number.

19206442 is a deficient number, since it is larger than the sum of its proper divisors (9603224).

19206442 is an equidigital number, since it uses as much as digits as its factorization.

19206442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9603223.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 19206442 is about 4382.5154877079. The cubic root of 19206442 is about 267.8031245110.

The spelling of 19206442 in words is "nineteen million, two hundred six thousand, four hundred forty-two".