21329594788 has 48 divisors (see below), whose sum is σ = 40198515840. Its totient is φ = 9872755200.

The previous prime is 21329594777. The next prime is 21329594791. The reversal of 21329594788 is 88749592312.

It is a super-2 number, since 2×21329594788² (a number of 21 digits) contains 22 as substring.

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, 592258 + ... + 627238.

It is an arithmetic number, because the mean of its divisors is an integer number (837469080).

Almost surely, 2^21329594788 is an apocalyptic number.

It is an amenable number.

21329594788 is a deficient number, since it is larger than the sum of its proper divisors (18868921052).

21329594788 is a wasteful number, since it uses less digits than its factorization.

21329594788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35188 (or 35186 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 58.

The spelling of 21329594788 in words is "twenty-one billion, three hundred twenty-nine million, five hundred ninety-four thousand, seven hundred eighty-eight".