20709012285 has 96 divisors (see below), whose sum is σ = 41845870080. Its totient is φ = 9658320768.

The previous prime is 20709012277. The next prime is 20709012287. The reversal of 20709012285 is 58221090702.

It is not a de Polignac number, because 20709012285 - 2³ = 20709012277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20709012287) 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 95 ways as a sum of consecutive naturals, for example, 617212 + ... + 649898.

It is an arithmetic number, because the mean of its divisors is an integer number (435894480).

Almost surely, 2^20709012285 is an apocalyptic number.

It is an amenable number.

20709012285 is an abundant number, since it is smaller than the sum of its proper divisors (21136857795).

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

20709012285 is a wasteful number, since it uses less digits than its factorization.

20709012285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32752 (or 32727 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 20709012285 in words is "twenty billion, seven hundred nine million, twelve thousand, two hundred eighty-five".