20726705706 has 24 divisors (see below), whose sum is σ = 48221316000. Its totient is φ = 5921915832.

The previous prime is 20726705683. The next prime is 20726705729. The reversal of 20726705706 is 60750762702.

It is an interprime number because it is at equal distance from previous prime (20726705683) and next prime (20726705729).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 35249206 + ... + 35249793.

It is an arithmetic number, because the mean of its divisors is an integer number (2009221500).

Almost surely, 2^20726705706 is an apocalyptic number.

20726705706 is an abundant number, since it is smaller than the sum of its proper divisors (27494610294).

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

20726705706 is a wasteful number, since it uses less digits than its factorization.

20726705706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70499018 (or 70499011 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 42.

The spelling of 20726705706 in words is "twenty billion, seven hundred twenty-six million, seven hundred five thousand, seven hundred six".