21322198529 has 4 divisors (see below), whose sum is σ = 21490089984. Its totient is φ = 21154307076.

The previous prime is 21322198517. The next prime is 21322198537. The reversal of 21322198529 is 92589122312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21322198529 - 2³² = 17027231233 is a prime.

It is a super-2 number, since 2×21322198529² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21322198529.

It is not an unprimeable number, because it can be changed into a prime (21322191529) 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 3 ways as a sum of consecutive naturals, for example, 83945537 + ... + 83945790.

It is an arithmetic number, because the mean of its divisors is an integer number (5372522496).

Almost surely, 2^21322198529 is an apocalyptic number.

It is an amenable number.

21322198529 is a deficient number, since it is larger than the sum of its proper divisors (167891455).

21322198529 is a wasteful number, since it uses less digits than its factorization.

21322198529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167891454.

The product of its digits is 155520, while the sum is 44.

The spelling of 21322198529 in words is "twenty-one billion, three hundred twenty-two million, one hundred ninety-eight thousand, five hundred twenty-nine".