21310698195 has 24 divisors (see below), whose sum is σ = 36946331136. Its totient is φ = 11363309568.

The previous prime is 21310698173. The next prime is 21310698197. The reversal of 21310698195 is 59189601312.

It is not a de Polignac number, because 21310698195 - 2¹⁰ = 21310697171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21310698195.

It is not an unprimeable number, because it can be changed into a prime (21310698197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177262 + ... + 272108.

It is an arithmetic number, because the mean of its divisors is an integer number (1539430464).

Almost surely, 2^21310698195 is an apocalyptic number.

21310698195 is a deficient number, since it is larger than the sum of its proper divisors (15635632941).

21310698195 is a wasteful number, since it uses less digits than its factorization.

21310698195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99851 (or 99848 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 21310698195 in words is "twenty-one billion, three hundred ten million, six hundred ninety-eight thousand, one hundred ninety-five".