19799700 has 72 divisors (see below), whose sum is σ = 59162880. Its totient is φ = 5107200.

The previous prime is 19799693. The next prime is 19799707. The reversal of 19799700 is 799791.

It is an interprime number because it is at equal distance from previous prime (19799693) and next prime (19799707).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19799707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8236 + ... + 10364.

Almost surely, 2^19799700 is an apocalyptic number.

19799700 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 19799700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29581440).

19799700 is an abundant number, since it is smaller than the sum of its proper divisors (39363180).

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

19799700 is a wasteful number, since it uses less digits than its factorization.

19799700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177 (or 2170 counting only the distinct ones).

The product of its (nonzero) digits is 35721, while the sum is 42.

The square root of 19799700 is about 4449.6853821366. The cubic root of 19799700 is about 270.5325565597.

The spelling of 19799700 in words is "nineteen million, seven hundred ninety-nine thousand, seven hundred".