20831261706 has 24 divisors (see below), whose sum is σ = 45172279620. Its totient is φ = 6937926336.

The previous prime is 20831261663. The next prime is 20831261719. The reversal of 20831261706 is 60716213802.

20831261706 is a `hidden beast` number, since 2 + 0 + 8 + 31 + 2 + 617 + 0 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20175645681 + 655616025 = 142041^2 + 25605^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 463561 + ... + 506508.

Almost surely, 2^20831261706 is an apocalyptic number.

20831261706 is an abundant number, since it is smaller than the sum of its proper divisors (24341017914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20831261706 is a wasteful number, since it uses less digits than its factorization.

20831261706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971270 (or 971267 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 20831261706 in words is "twenty billion, eight hundred thirty-one million, two hundred sixty-one thousand, seven hundred six".