20543642631016 has 16 divisors (see below), whose sum is σ = 38519387719200. Its totient is φ = 10271805905904.

The previous prime is 20543642630999. The next prime is 20543642631067. The reversal of 20543642631016 is 61013624634502.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5361861 + ... + 8356843.

It is an arithmetic number, because the mean of its divisors is an integer number (2407461732450).

Almost surely, 2^{20543642631016} is an apocalyptic number.

It is an amenable number.

20543642631016 is a deficient number, since it is larger than the sum of its proper divisors (17975745088184).

20543642631016 is a wasteful number, since it uses less digits than its factorization.

20543642631016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852408 (or 3852404 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 20543642631016 in words is "twenty trillion, five hundred forty-three billion, six hundred forty-two million, six hundred thirty-one thousand, sixteen".