19421882 has 4 divisors (see below), whose sum is σ = 29132826. Its totient is φ = 9710940.

The previous prime is 19421879. The next prime is 19421911. The reversal of 19421882 is 28812491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28812491 = 23 ⋅1252717.

It can be written as a sum of positive squares in only one way, i.e., 17547721 + 1874161 = 4189^2 + 1369^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4855469 + ... + 4855472.

Almost surely, 2^19421882 is an apocalyptic number.

19421882 is a deficient number, since it is larger than the sum of its proper divisors (9710944).

19421882 is an equidigital number, since it uses as much as digits as its factorization.

19421882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9710943.

The product of its digits is 9216, while the sum is 35.

The square root of 19421882 is about 4407.0264351374. The cubic root of 19421882 is about 268.8007258135.

The spelling of 19421882 in words is "nineteen million, four hundred twenty-one thousand, eight hundred eighty-two".