19212004 has 12 divisors (see below), whose sum is σ = 38424064. Its totient is φ = 8233704.

The previous prime is 19212001. The next prime is 19212019. The reversal of 19212004 is 40021291.

19212004 = 558² + 559² + ... + 613².

19212004 is an admirable number.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (19212001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343044 + ... + 343099.

Almost surely, 2^19212004 is an apocalyptic number.

19212004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19212004 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.

19212004 is a wasteful number, since it uses less digits than its factorization.

19212004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686154 (or 686152 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 19212004 is about 4383.1500088407. The cubic root of 19212004 is about 267.8289730816.

Adding to 19212004 its reverse (40021291), we get a palindrome (59233295).

The spelling of 19212004 in words is "nineteen million, two hundred twelve thousand, four".