20122644992 has 20 divisors (see below), whose sum is σ = 40205988966. Its totient is φ = 10061322240.

The previous prime is 20122644967. The next prime is 20122645013. The reversal of 20122644992 is 29944622102.

It can be written as a sum of positive squares in only one way, i.e., 18929357056 + 1193287936 = 137584^2 + 34544^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19650509 + ... + 19651532.

Almost surely, 2^20122644992 is an apocalyptic number.

It is an amenable number.

20122644992 is a deficient number, since it is larger than the sum of its proper divisors (20083343974).

20122644992 is an frugal number, since it uses more digits than its factorization.

20122644992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39302059 (or 39302043 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 20122644992 in words is "twenty billion, one hundred twenty-two million, six hundred forty-four thousand, nine hundred ninety-two".