22720475477 has 12 divisors (see below), whose sum is σ = 26449437996. Its totient is φ = 19460327040.

The previous prime is 22720475473. The next prime is 22720475483. The reversal of 22720475477 is 77457402722.

It can be written as a sum of positive squares in 2 ways, for example, as 2998767121 + 19721708356 = 54761^2 + 140434^2 .

It is not a de Polignac number, because 22720475477 - 2² = 22720475473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22720475473) 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 11 ways as a sum of consecutive naturals, for example, 103658 + ... + 237035.

It is an arithmetic number, because the mean of its divisors is an integer number (2204119833).

Almost surely, 2^22720475477 is an apocalyptic number.

It is an amenable number.

22720475477 is a deficient number, since it is larger than the sum of its proper divisors (3728962519).

22720475477 is a wasteful number, since it uses less digits than its factorization.

22720475477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342068 (or 342061 counting only the distinct ones).

The product of its (nonzero) digits is 1536640, while the sum is 47.

The spelling of 22720475477 in words is "twenty-two billion, seven hundred twenty million, four hundred seventy-five thousand, four hundred seventy-seven".