20015431632616 has 24 divisors (see below), whose sum is σ = 43656107260770. Its totient is φ = 8578042128096.

The previous prime is 20015431632611. The next prime is 20015431632629. The reversal of 20015431632616 is 61623613451002.

It can be written as a sum of positive squares in only one way, i.e., 10977652068516 + 9037779564100 = 3313254^2 + 3006290^2 .

It is not an unprimeable number, because it can be changed into a prime (20015431632611) 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 5 ways as a sum of consecutive naturals, for example, 25529886895 + ... + 25529887678.

Almost surely, 2^{20015431632616} is an apocalyptic number.

It is an amenable number.

20015431632616 is an abundant number, since it is smaller than the sum of its proper divisors (23640675628154).

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

20015431632616 is a wasteful number, since it uses less digits than its factorization.

20015431632616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51059774593 (or 51059774582 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 20015431632616 in words is "twenty trillion, fifteen billion, four hundred thirty-one million, six hundred thirty-two thousand, six hundred sixteen".