19897934 has 32 divisors (see below), whose sum is σ = 35458560. Its totient is φ = 8196768.

The previous prime is 19897919. The next prime is 19897937. The reversal of 19897934 is 43979891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19897937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55247 + ... + 55605.

It is an arithmetic number, because the mean of its divisors is an integer number (1108080).

Almost surely, 2^19897934 is an apocalyptic number.

19897934 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19897934 is a deficient number, since it is larger than the sum of its proper divisors (15560626).

19897934 is a wasteful number, since it uses less digits than its factorization.

19897934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512.

The product of its digits is 489888, while the sum is 50.

The square root of 19897934 is about 4460.7100331674. The cubic root of 19897934 is about 270.9792243619.

The spelling of 19897934 in words is "nineteen million, eight hundred ninety-seven thousand, nine hundred thirty-four".