20362562081 has 2 divisors, whose sum is σ = 20362562082. Its totient is φ = 20362562080.

The previous prime is 20362562053. The next prime is 20362562113. The reversal of 20362562081 is 18026526302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19150408225 + 1212153856 = 138385^2 + 34816^2 .

It is a cyclic number.

It is not a de Polignac number, because 20362562081 - 2³⁴ = 3182692897 is a prime.

It is a super-2 number, since 2×20362562081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20362562021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10181281040 + 10181281041.

It is an arithmetic number, because the mean of its divisors is an integer number (10181281041).

Almost surely, 2^20362562081 is an apocalyptic number.

It is an amenable number.

20362562081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20362562081 is an equidigital number, since it uses as much as digits as its factorization.

20362562081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 20362562081 in words is "twenty billion, three hundred sixty-two million, five hundred sixty-two thousand, eighty-one".