20770824261 has 32 divisors (see below), whose sum is σ = 30406311936. Its totient is φ = 12507624000.

The previous prime is 20770824241. The next prime is 20770824317. The reversal of 20770824261 is 16242807702.

It is not a de Polignac number, because 20770824261 - 2⁷ = 20770824133 is a prime.

It is a super-2 number, since 2×20770824261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770824241) 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 in 31 ways as a sum of consecutive naturals, for example, 7757655 + ... + 7760331.

It is an arithmetic number, because the mean of its divisors is an integer number (950197248).

Almost surely, 2^20770824261 is an apocalyptic number.

It is an amenable number.

20770824261 is a deficient number, since it is larger than the sum of its proper divisors (9635487675).

20770824261 is a wasteful number, since it uses less digits than its factorization.

20770824261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113.

The product of its (nonzero) digits is 75264, while the sum is 39.

The spelling of 20770824261 in words is "twenty billion, seven hundred seventy million, eight hundred twenty-four thousand, two hundred sixty-one".