20826747672 has 32 divisors (see below), whose sum is σ = 52446927600. Its totient is φ = 6891574784.

The previous prime is 20826747587. The next prime is 20826747703. The reversal of 20826747672 is 27674762802.

It is a congruent number.

It is an unprimeable number.

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, 3163797 + ... + 3170372.

Almost surely, 2^20826747672 is an apocalyptic number.

It is an amenable number.

20826747672 is an abundant number, since it is smaller than the sum of its proper divisors (31620179928).

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

20826747672 is a wasteful number, since it uses less digits than its factorization.

20826747672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6334315 (or 6334311 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 51.

The spelling of 20826747672 in words is "twenty billion, eight hundred twenty-six million, seven hundred forty-seven thousand, six hundred seventy-two".