19997110 has 16 divisors (see below), whose sum is σ = 41137056. Its totient is φ = 6856128.

The previous prime is 19997099. The next prime is 19997119. The reversal of 19997110 is 1179991.

It is a self number, because there is not a number n which added to its sum of digits gives 19997110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19997119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142767 + ... + 142906.

It is an arithmetic number, because the mean of its divisors is an integer number (2571066).

Almost surely, 2^19997110 is an apocalyptic number.

19997110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19997110 is an abundant number, since it is smaller than the sum of its proper divisors (21139946).

19997110 is a wasteful number, since it uses less digits than its factorization.

19997110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285687.

The product of its (nonzero) digits is 5103, while the sum is 37.

The square root of 19997110 is about 4471.8128315036. The cubic root of 19997110 is about 271.4286865848.

It can be divided in two parts, 19 and 997110, that multiplied together give a triangular number (18945090 = T₆₁₅₅).

The spelling of 19997110 in words is "nineteen million, nine hundred ninety-seven thousand, one hundred ten".