19799790 has 32 divisors (see below), whose sum is σ = 48175776. Its totient is φ = 5207040.

The previous prime is 19799783. The next prime is 19799797. The reversal of 19799790 is 9799791.

It is an interprime number because it is at equal distance from previous prime (19799783) and next prime (19799797).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19799797) 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, 2331 + ... + 6710.

It is an arithmetic number, because the mean of its divisors is an integer number (1505493).

Almost surely, 2^19799790 is an apocalyptic number.

19799790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19799790 is an abundant number, since it is smaller than the sum of its proper divisors (28375986).

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

19799790 is a wasteful number, since it uses less digits than its factorization.

19799790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9124.

The product of its (nonzero) digits is 321489, while the sum is 51.

The square root of 19799790 is about 4449.6954951996. The cubic root of 19799790 is about 270.5329664631.

Subtracting from 19799790 its reverse (9799791), we obtain a palindrome (9999999).

The spelling of 19799790 in words is "nineteen million, seven hundred ninety-nine thousand, seven hundred ninety".