21320088195 has 256 divisors, whose sum is σ = 45909504000. Its totient is φ = 8212119552.

The previous prime is 21320088143. The next prime is 21320088199. The reversal of 21320088195 is 59188002312.

It is a Cunningham number, because it is equal to 146014²-1.

It is not a de Polignac number, because 21320088195 - 2¹⁴ = 21320071811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21320088199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 52127151 + ... + 52127559.

It is an arithmetic number, because the mean of its divisors is an integer number (179334000).

Almost surely, 2^21320088195 is an apocalyptic number.

21320088195 is an abundant number, since it is smaller than the sum of its proper divisors (24589415805).

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

21320088195 is a wasteful number, since it uses less digits than its factorization.

21320088195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542.

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 21320088195 in words is "twenty-one billion, three hundred twenty million, eighty-eight thousand, one hundred ninety-five".