20420961277 has 8 divisors (see below), whose sum is σ = 20854112672. Its totient is φ = 19990983600.

The previous prime is 20420961271. The next prime is 20420961287. The reversal of 20420961277 is 77216902402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20420961277 - 2⁷ = 20420961149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420961271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780423 + ... + 806164.

It is an arithmetic number, because the mean of its divisors is an integer number (2606764084).

Almost surely, 2^20420961277 is an apocalyptic number.

It is an amenable number.

20420961277 is a deficient number, since it is larger than the sum of its proper divisors (433151395).

20420961277 is a wasteful number, since it uses less digits than its factorization.

20420961277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586859.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 20420961277 in words is "twenty billion, four hundred twenty million, nine hundred sixty-one thousand, two hundred seventy-seven".