21022503536 has 20 divisors (see below), whose sum is σ = 40754469672. Its totient is φ = 10505221056.

The previous prime is 21022503517. The next prime is 21022503553. The reversal of 21022503536 is 63530522012.

It is a super-2 number, since 2×21022503536² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21022503499 and 21022503508.

It is a congruent number.

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, 348095 + ... + 403998.

Almost surely, 2^21022503536 is an apocalyptic number.

It is an amenable number.

21022503536 is a deficient number, since it is larger than the sum of its proper divisors (19731966136).

21022503536 is a wasteful number, since it uses less digits than its factorization.

21022503536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753848 (or 753842 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 21022503536 in words is "twenty-one billion, twenty-two million, five hundred three thousand, five hundred thirty-six".