19311404 has 12 divisors (see below), whose sum is σ = 38622864. Its totient is φ = 8276304.

The previous prime is 19311403. The next prime is 19311427. The reversal of 19311404 is 40411391.

19311404 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 19311404.

It is not an unprimeable number, because it can be changed into a prime (19311403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344819 + ... + 344874.

It is an arithmetic number, because the mean of its divisors is an integer number (3218572).

Almost surely, 2^19311404 is an apocalyptic number.

19311404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19311404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19311404 is a wasteful number, since it uses less digits than its factorization.

19311404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689704 (or 689702 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 19311404 is about 4394.4742575193. The cubic root of 19311404 is about 268.2900809453.

Adding to 19311404 its reverse (40411391), we get a palindrome (59722795).

The spelling of 19311404 in words is "nineteen million, three hundred eleven thousand, four hundred four".