19997334 has 32 divisors (see below), whose sum is σ = 50787840. Its totient is φ = 5713416.

The previous prime is 19997333. The next prime is 19997339. The reversal of 19997334 is 43379991.

It is a self number, because there is not a number n which added to its sum of digits gives 19997334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19997333) 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, 26074 + ... + 26829.

It is an arithmetic number, because the mean of its divisors is an integer number (1587120).

Almost surely, 2^19997334 is an apocalyptic number.

19997334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19997334 is an abundant number, since it is smaller than the sum of its proper divisors (30790506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19997334 is a wasteful number, since it uses less digits than its factorization.

19997334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52921 (or 52915 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 19997334 is about 4471.8378772044. The cubic root of 19997334 is about 271.4297000613.

The spelling of 19997334 in words is "nineteen million, nine hundred ninety-seven thousand, three hundred thirty-four".