19922156 has 6 divisors (see below), whose sum is σ = 34863780. Its totient is φ = 9961076.

The previous prime is 19922143. The next prime is 19922167. The reversal of 19922156 is 65122991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2490266 + ... + 2490273.

It is an arithmetic number, because the mean of its divisors is an integer number (5810630).

Almost surely, 2^19922156 is an apocalyptic number.

It is an amenable number.

19922156 is a deficient number, since it is larger than the sum of its proper divisors (14941624).

19922156 is a wasteful number, since it uses less digits than its factorization.

19922156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4980543 (or 4980541 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 19922156 is about 4463.4242460246. The cubic root of 19922156 is about 271.0891352239.

It can be divided in two parts, 199 and 22156, that multiplied together give a palindrome (4409044).

The spelling of 19922156 in words is "nineteen million, nine hundred twenty-two thousand, one hundred fifty-six".