19981035 has 24 divisors (see below), whose sum is σ = 36672480. Its totient is φ = 10029312.

The previous prime is 19981021. The next prime is 19981057. The reversal of 19981035 is 53018991.

It is a happy number.

It is not a de Polignac number, because 19981035 - 2⁷ = 19980907 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 12295 + ... + 13824.

It is an arithmetic number, because the mean of its divisors is an integer number (1528020).

Almost surely, 2^19981035 is an apocalyptic number.

19981035 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19981035 is a deficient number, since it is larger than the sum of its proper divisors (16691445).

19981035 is a wasteful number, since it uses less digits than its factorization.

19981035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26147 (or 26144 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 19981035 is about 4470.0151006456. The cubic root of 19981035 is about 271.3559363090.

The spelling of 19981035 in words is "nineteen million, nine hundred eighty-one thousand, thirty-five".