21889135277 has 2 divisors, whose sum is σ = 21889135278. Its totient is φ = 21889135276.

The previous prime is 21889135271. The next prime is 21889135319. The reversal of 21889135277 is 77253198812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17865262921 + 4023872356 = 133661^2 + 63434^2 .

It is a cyclic number.

It is not a de Polignac number, because 21889135277 - 2¹² = 21889131181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21889135271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10944567638 + 10944567639.

It is an arithmetic number, because the mean of its divisors is an integer number (10944567639).

Almost surely, 2^21889135277 is an apocalyptic number.

It is an amenable number.

21889135277 is a deficient number, since it is larger than the sum of its proper divisors (1).

21889135277 is an equidigital number, since it uses as much as digits as its factorization.

21889135277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 53.

The spelling of 21889135277 in words is "twenty-one billion, eight hundred eighty-nine million, one hundred thirty-five thousand, two hundred seventy-seven".