20829263616 has 144 divisors (see below), whose sum is σ = 70395360000. Its totient is φ = 5951204352.

The previous prime is 20829263561. The next prime is 20829263639. The reversal of 20829263616 is 61636292802.

20829263616 is a `hidden beast` number, since 2 + 0 + 8 + 2 + 9 + 2 + 636 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166866 + ... + 263633.

Almost surely, 2^20829263616 is an apocalyptic number.

It is an amenable number.

20829263616 is an abundant number, since it is smaller than the sum of its proper divisors (49566096384).

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

20829263616 is an equidigital number, since it uses as much as digits as its factorization.

20829263616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430531 (or 430511 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 20829263616 in words is "twenty billion, eight hundred twenty-nine million, two hundred sixty-three thousand, six hundred sixteen".