19113402 has 48 divisors (see below), whose sum is σ = 48033216. Its totient is φ = 4963200.

The previous prime is 19113397. The next prime is 19113403. The reversal of 19113402 is 20431191.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (19113403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3202 + ... + 6962.

It is an arithmetic number, because the mean of its divisors is an integer number (1000692).

Almost surely, 2^19113402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19113402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24016608).

19113402 is an abundant number, since it is smaller than the sum of its proper divisors (28919814).

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

19113402 is a wasteful number, since it uses less digits than its factorization.

19113402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3795 (or 3784 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 19113402 is about 4371.8876929766. The cubic root of 19113402 is about 267.3699930171.

Adding to 19113402 its reverse (20431191), we get a palindrome (39544593).

The spelling of 19113402 in words is "nineteen million, one hundred thirteen thousand, four hundred two".