20311222044 has 12 divisors (see below), whose sum is σ = 47392851464. Its totient is φ = 6770407344.

The previous prime is 20311222031. The next prime is 20311222069. The reversal of 20311222044 is 44022211302.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20311222044.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846300907 + ... + 846300930.

Almost surely, 2^20311222044 is an apocalyptic number.

It is an amenable number.

20311222044 is an abundant number, since it is smaller than the sum of its proper divisors (27081629420).

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

20311222044 is a wasteful number, since it uses less digits than its factorization.

20311222044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692601844 (or 1692601842 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20311222044 its reverse (44022211302), we get a palindrome (64333433346).

The spelling of 20311222044 in words is "twenty billion, three hundred eleven million, two hundred twenty-two thousand, forty-four".