22718954781 has 6 divisors (see below), whose sum is σ = 32816268030. Its totient is φ = 15145969848.

The previous prime is 22718954767. The next prime is 22718954821. The reversal of 22718954781 is 18745981722.

22718954781 is a `hidden beast` number, since 2 + 2 + 7 + 18 + 9 + 547 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12975488100 + 9743466681 = 113910^2 + 98709^2 .

It is not a de Polignac number, because 22718954781 - 2¹⁰ = 22718953757 is a prime.

It is a super-2 number, since 2×22718954781² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22718954701) 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 5 ways as a sum of consecutive naturals, for example, 1262164146 + ... + 1262164163.

It is an arithmetic number, because the mean of its divisors is an integer number (5469378005).

Almost surely, 2^22718954781 is an apocalyptic number.

It is an amenable number.

22718954781 is a deficient number, since it is larger than the sum of its proper divisors (10097313249).

22718954781 is a wasteful number, since it uses less digits than its factorization.

22718954781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524328315 (or 2524328312 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The spelling of 22718954781 in words is "twenty-two billion, seven hundred eighteen million, nine hundred fifty-four thousand, seven hundred eighty-one".