19212102 has 96 divisors (see below), whose sum is σ = 52782912. Its totient is φ = 4914432.

The previous prime is 19212077. The next prime is 19212113. The reversal of 19212102 is 20121291.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 60448 + ... + 60764.

It is an arithmetic number, because the mean of its divisors is an integer number (549822).

Almost surely, 2^19212102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19212102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26391456).

19212102 is an abundant number, since it is smaller than the sum of its proper divisors (33570810).

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

19212102 is a wasteful number, since it uses less digits than its factorization.

19212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 19212102 is about 4383.1611880012. The cubic root of 19212102 is about 267.8294284773.

Adding to 19212102 its reverse (20121291), we get a palindrome (39333393).

The spelling of 19212102 in words is "nineteen million, two hundred twelve thousand, one hundred two".