21191322328698 has 64 divisors (see below), whose sum is σ = 45009333872640. Its totient is φ = 6632816740992.

The previous prime is 21191322328669. The next prime is 21191322328699. The reversal of 21191322328698 is 89682322319112.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (21191322328699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5265886 + ... + 8373302.

It is an arithmetic number, because the mean of its divisors is an integer number (703270841760).

Almost surely, 2^{21191322328698} is an apocalyptic number.

21191322328698 is an abundant number, since it is smaller than the sum of its proper divisors (23818011543942).

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

21191322328698 is a wasteful number, since it uses less digits than its factorization.

21191322328698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107971.

The product of its digits is 4478976, while the sum is 57.

The spelling of 21191322328698 in words is "twenty-one trillion, one hundred ninety-one billion, three hundred twenty-two million, three hundred twenty-eight thousand, six hundred ninety-eight".