20276891969 has 2 divisors, whose sum is σ = 20276891970. Its totient is φ = 20276891968.

The previous prime is 20276891963. The next prime is 20276892043. The reversal of 20276891969 is 96919867202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19750648369 + 526243600 = 140537^2 + 22940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20276891969 is a prime.

It is a super-2 number, since 2×20276891969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20276891963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138445984 + 10138445985.

It is an arithmetic number, because the mean of its divisors is an integer number (10138445985).

Almost surely, 2^20276891969 is an apocalyptic number.

It is an amenable number.

20276891969 is a deficient number, since it is larger than the sum of its proper divisors (1).

20276891969 is an equidigital number, since it uses as much as digits as its factorization.

20276891969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The spelling of 20276891969 in words is "twenty billion, two hundred seventy-six million, eight hundred ninety-one thousand, nine hundred sixty-nine".