19802026 has 8 divisors (see below), whose sum is σ = 29746080. Its totient is φ = 9886668.

The previous prime is 19802023. The next prime is 19802033. The reversal of 19802026 is 62020891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 19801985 and 19802003.

It is not an unprimeable number, because it can be changed into a prime (19802021) 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, 5356 + ... + 8263.

It is an arithmetic number, because the mean of its divisors is an integer number (3718260).

Almost surely, 2^19802026 is an apocalyptic number.

19802026 is a deficient number, since it is larger than the sum of its proper divisors (9944054).

19802026 is a wasteful number, since it uses less digits than its factorization.

19802026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14348.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 19802026 is about 4449.9467412543. The cubic root of 19802026 is about 270.5431498866.

The spelling of 19802026 in words is "nineteen million, eight hundred two thousand, twenty-six".