16821000764 has 24 divisors (see below), whose sum is σ = 29909452608. Its totient is φ = 8275979520.

The previous prime is 16821000733. The next prime is 16821000767. The reversal of 16821000764 is 46700012861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16821000767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59024 + ... + 192680.

It is an arithmetic number, because the mean of its divisors is an integer number (1246227192).

Almost surely, 2^16821000764 is an apocalyptic number.

It is an amenable number.

16821000764 is a deficient number, since it is larger than the sum of its proper divisors (13088451844).

16821000764 is a wasteful number, since it uses less digits than its factorization.

16821000764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134165 (or 134163 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 16821000764 in words is "sixteen billion, eight hundred twenty-one million, seven hundred sixty-four", and thus it is an aban number.