19996280 has 64 divisors (see below), whose sum is σ = 47196000. Its totient is φ = 7617024.

The previous prime is 19996279. The next prime is 19996297. The reversal of 19996280 is 8269991.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87206 + ... + 87434.

Almost surely, 2^19996280 is an apocalyptic number.

19996280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19996280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23598000).

19996280 is an abundant number, since it is smaller than the sum of its proper divisors (27199720).

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

19996280 is a wasteful number, since it uses less digits than its factorization.

19996280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 332 counting only the distinct ones).

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

The square root of 19996280 is about 4471.7200270142. The cubic root of 19996280 is about 271.4249312267.

The spelling of 19996280 in words is "nineteen million, nine hundred ninety-six thousand, two hundred eighty".