20467466681 has 2 divisors, whose sum is σ = 20467466682. Its totient is φ = 20467466680.

The previous prime is 20467466651. The next prime is 20467466689. The reversal of 20467466681 is 18666476402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11522090281 + 8945376400 = 107341^2 + 94580^2 .

It is a cyclic number.

It is not a de Polignac number, because 20467466681 - 2³⁴ = 3287597497 is a prime.

It is a super-2 number, since 2×20467466681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20467466689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10233733340 + 10233733341.

It is an arithmetic number, because the mean of its divisors is an integer number (10233733341).

Almost surely, 2^20467466681 is an apocalyptic number.

It is an amenable number.

20467466681 is a deficient number, since it is larger than the sum of its proper divisors (1).

20467466681 is an equidigital number, since it uses as much as digits as its factorization.

20467466681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 20467466681 in words is "twenty billion, four hundred sixty-seven million, four hundred sixty-six thousand, six hundred eighty-one".