20272654081 has 2 divisors, whose sum is σ = 20272654082. Its totient is φ = 20272654080.

The previous prime is 20272654063. The next prime is 20272654091. The reversal of 20272654081 is 18045627202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14908410000 + 5364244081 = 122100^2 + 73241^2 .

It is a cyclic number.

It is not a de Polignac number, because 20272654081 - 2¹¹ = 20272652033 is a prime.

It is a super-2 number, since 2×20272654081² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20272654081.

It is not a weakly prime, because it can be changed into another prime (20272654021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10136327040 + 10136327041.

It is an arithmetic number, because the mean of its divisors is an integer number (10136327041).

Almost surely, 2^20272654081 is an apocalyptic number.

It is an amenable number.

20272654081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20272654081 is an equidigital number, since it uses as much as digits as its factorization.

20272654081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 20272654081 in words is "twenty billion, two hundred seventy-two million, six hundred fifty-four thousand, eighty-one".