19913364 has 42 divisors (see below), whose sum is σ = 52256330. Its totient is φ = 6636816.

The previous prime is 19913353. The next prime is 19913393. The reversal of 19913364 is 46331991.

It can be written as a sum of positive squares in only one way, i.e., 17288964 + 2624400 = 4158^2 + 1620^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 499 + ... + 6330.

Almost surely, 2^19913364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19913364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26128165).

19913364 is an abundant number, since it is smaller than the sum of its proper divisors (32342966).

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

19913364 is an equidigital number, since it uses as much as digits as its factorization.

19913364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6851 (or 6834 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 19913364 is about 4462.4392432839. The cubic root of 19913364 is about 271.0492505451.

The spelling of 19913364 in words is "nineteen million, nine hundred thirteen thousand, three hundred sixty-four".