19699794 has 32 divisors (see below), whose sum is σ = 44280000. Its totient is φ = 6491232.

The previous prime is 19699793. The next prime is 19699807. The reversal of 19699794 is 49799691.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 19699794.

It is not an unprimeable number, because it can be changed into a prime (19699793) 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, 2757 + ... + 6855.

It is an arithmetic number, because the mean of its divisors is an integer number (1383750).

Almost surely, 2^19699794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19699794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22140000).

19699794 is an abundant number, since it is smaller than the sum of its proper divisors (24580206).

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

19699794 is a wasteful number, since it uses less digits than its factorization.

19699794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4199 (or 4193 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 19699794 is about 4438.4449979694. Note that the first 3 decimals coincide. The cubic root of 19699794 is about 270.0767682941.

The spelling of 19699794 in words is "nineteen million, six hundred ninety-nine thousand, seven hundred ninety-four".