19211458068 has 192 divisors, whose sum is σ = 58593024000. Its totient is φ = 5380473600.

The previous prime is 19211458051. The next prime is 19211458121. The reversal of 19211458068 is 86085411291.

It is a happy number.

19211458068 is a `hidden beast` number, since 1 + 9 + 2 + 1 + 1 + 4 + 580 + 68 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 915073 + ... + 935831.

It is an arithmetic number, because the mean of its divisors is an integer number (305172000).

Almost surely, 2^19211458068 is an apocalyptic number.

19211458068 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19211458068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29296512000).

19211458068 is an abundant number, since it is smaller than the sum of its proper divisors (39381565932).

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

19211458068 is a wasteful number, since it uses less digits than its factorization.

19211458068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20843 (or 20835 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 19211458068 in words is "nineteen billion, two hundred eleven million, four hundred fifty-eight thousand, sixty-eight".