39651000020 has 24 divisors (see below), whose sum is σ = 83271429864. Its totient is φ = 15859575296.

The previous prime is 39651000017. The next prime is 39651000061. The reversal of 39651000020 is 2000015693.

It can be written as a sum of positive squares in 4 ways, for example, as 3991965124 + 35659034896 = 63182^2 + 188836^2 .

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, 472784 + ... + 550296.

It is an arithmetic number, because the mean of its divisors is an integer number (3469642911).

Almost surely, 2^39651000020 is an apocalyptic number.

It is an amenable number.

39651000020 is an abundant number, since it is smaller than the sum of its proper divisors (43620429844).

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

39651000020 is a wasteful number, since it uses less digits than its factorization.

39651000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103099 (or 103097 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The spelling of 39651000020 in words is "thirty-nine billion, six hundred fifty-one million, twenty", and thus it is an aban number.