21069185332 has 18 divisors (see below), whose sum is σ = 39709283558. Its totient is φ = 9723756288.

The previous prime is 21069185323. The next prime is 21069185339. The reversal of 21069185332 is 23358196012.

It can be written as a sum of positive squares in 3 ways, for example, as 7861659556 + 13207525776 = 88666^2 + 114924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21069185339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1036644 + ... + 1056772.

Almost surely, 2^21069185332 is an apocalyptic number.

It is an amenable number.

21069185332 is a deficient number, since it is larger than the sum of its proper divisors (18640098226).

21069185332 is an frugal number, since it uses more digits than its factorization.

21069185332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40275 (or 20144 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 21069185332 in words is "twenty-one billion, sixty-nine million, one hundred eighty-five thousand, three hundred thirty-two".