20742271277 has 24 divisors (see below), whose sum is σ = 26153622144. Its totient is φ = 16101768384.

The previous prime is 20742271267. The next prime is 20742271301. The reversal of 20742271277 is 77217224702.

It is not a de Polignac number, because 20742271277 - 2⁴ = 20742271261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20742271237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102713 + ... + 228110.

It is an arithmetic number, because the mean of its divisors is an integer number (1089734256).

Almost surely, 2^20742271277 is an apocalyptic number.

It is an amenable number.

20742271277 is a deficient number, since it is larger than the sum of its proper divisors (5411350867).

20742271277 is a wasteful number, since it uses less digits than its factorization.

20742271277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330909 (or 330896 counting only the distinct ones).

The product of its (nonzero) digits is 153664, while the sum is 41.

Adding to 20742271277 its reverse (77217224702), we get a palindrome (97959495979).

The spelling of 20742271277 in words is "twenty billion, seven hundred forty-two million, two hundred seventy-one thousand, two hundred seventy-seven".