21102062852 has 12 divisors (see below), whose sum is σ = 39769272396. Its totient is φ = 9739413600.

The previous prime is 21102062833. The next prime is 21102062881. The reversal of 21102062852 is 25826020112.

It can be written as a sum of positive squares in 2 ways, for example, as 12655350016 + 8446712836 = 112496^2 + 91906^2 .

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, 202904399 + ... + 202904502.

It is an arithmetic number, because the mean of its divisors is an integer number (3314106033).

Almost surely, 2^21102062852 is an apocalyptic number.

It is an amenable number.

21102062852 is a deficient number, since it is larger than the sum of its proper divisors (18667209544).

21102062852 is a wasteful number, since it uses less digits than its factorization.

21102062852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405808918 (or 405808916 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 21102062852 its reverse (25826020112), we get a palindrome (46928082964).

The spelling of 21102062852 in words is "twenty-one billion, one hundred two million, sixty-two thousand, eight hundred fifty-two".