20822889349 has 4 divisors (see below), whose sum is σ = 20824683660. Its totient is φ = 20821095040.

The previous prime is 20822889271. The next prime is 20822889371. The reversal of 20822889349 is 94398822802.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3646952100 + 17175937249 = 60390^2 + 131057^2 .

It is a cyclic number.

It is not a de Polignac number, because 20822889349 - 2⁷ = 20822889221 is a prime.

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 20822889349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20822889049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879634 + ... + 902995.

It is an arithmetic number, because the mean of its divisors is an integer number (5206170915).

Almost surely, 2^20822889349 is an apocalyptic number.

It is an amenable number.

20822889349 is a deficient number, since it is larger than the sum of its proper divisors (1794311).

20822889349 is a wasteful number, since it uses less digits than its factorization.

20822889349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794310.

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 20822889349 in words is "twenty billion, eight hundred twenty-two million, eight hundred eighty-nine thousand, three hundred forty-nine".