21196367906392 has 128 divisors (see below), whose sum is σ = 47391509053440. Its totient is φ = 8696732365440.

The previous prime is 21196367906339. The next prime is 21196367906453. The reversal of 21196367906392 is 29360976369112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76365253 + ... + 76642315.

It is an arithmetic number, because the mean of its divisors is an integer number (370246164480).

Almost surely, 2^{21196367906392} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21196367906392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23695754526720).

21196367906392 is an abundant number, since it is smaller than the sum of its proper divisors (26195141147048).

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

21196367906392 is a wasteful number, since it uses less digits than its factorization.

21196367906392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277581 (or 277577 counting only the distinct ones).

The product of its (nonzero) digits is 39680928, while the sum is 64.

The spelling of 21196367906392 in words is "twenty-one trillion, one hundred ninety-six billion, three hundred sixty-seven million, nine hundred six thousand, three hundred ninety-two".