19934790 has 64 divisors (see below), whose sum is σ = 50512896. Its totient is φ = 5025152.

The previous prime is 19934779. The next prime is 19934791. The reversal of 19934790 is 9743991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19934791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115144 + ... + 115316.

It is an arithmetic number, because the mean of its divisors is an integer number (789264).

Almost surely, 2^19934790 is an apocalyptic number.

19934790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19934790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25256448).

19934790 is an abundant number, since it is smaller than the sum of its proper divisors (30578106).

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

19934790 is a wasteful number, since it uses less digits than its factorization.

19934790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 19934790 is about 4464.8393028193. The cubic root of 19934790 is about 271.1464284940.

The spelling of 19934790 in words is "nineteen million, nine hundred thirty-four thousand, seven hundred ninety".