19980926 has 24 divisors (see below), whose sum is σ = 35994816. Its totient is φ = 8285760.

The previous prime is 19980911. The next prime is 19980943. The reversal of 19980926 is 62908991.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 251 + ... + 6326.

It is an arithmetic number, because the mean of its divisors is an integer number (1499784).

Almost surely, 2^19980926 is an apocalyptic number.

19980926 is a deficient number, since it is larger than the sum of its proper divisors (16013890).

19980926 is a wasteful number, since it uses less digits than its factorization.

19980926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6624 (or 6617 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 19980926 is about 4470.0029082765. The cubic root of 19980926 is about 271.3554428769.

The spelling of 19980926 in words is "nineteen million, nine hundred eighty thousand, nine hundred twenty-six".