21197435698296 has 896 divisors, whose sum is σ = 71322499584000. Its totient is φ = 5818760893440.

The previous prime is 21197435698291. The next prime is 21197435698321. The reversal of 21197435698296 is 69289653479112.

21197435698296 is a `hidden beast` number, since 2 + 1 + 19 + 7 + 43 + 569 + 8 + 2 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21197435698291) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 19500860265 + ... + 19500861351.

It is an arithmetic number, because the mean of its divisors is an integer number (79601004000).

Almost surely, 2^{21197435698296} is an apocalyptic number.

21197435698296 is a gapful number since it is divisible by the number (26) 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 21197435698296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35661249792000).

21197435698296 is an abundant number, since it is smaller than the sum of its proper divisors (50125063885704).

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

21197435698296 is a wasteful number, since it uses less digits than its factorization.

21197435698296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551 (or 1532 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 72.

The spelling of 21197435698296 in words is "twenty-one trillion, one hundred ninety-seven billion, four hundred thirty-five million, six hundred ninety-eight thousand, two hundred ninety-six".