21535460552 has 32 divisors (see below), whose sum is σ = 42742814400. Its totient is φ = 10154647104.

The previous prime is 21535460539. The next prime is 21535460633. The reversal of 21535460552 is 25506453512.

It is a super-2 number, since 2×21535460552² (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 7 ways as a sum of consecutive naturals, for example, 1069388 + ... + 1089339.

It is an arithmetic number, because the mean of its divisors is an integer number (1335712950).

Almost surely, 2^21535460552 is an apocalyptic number.

It is an amenable number.

21535460552 is a deficient number, since it is larger than the sum of its proper divisors (21207353848).

21535460552 is a wasteful number, since it uses less digits than its factorization.

21535460552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158805 (or 2158801 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 21535460552 in words is "twenty-one billion, five hundred thirty-five million, four hundred sixty thousand, five hundred fifty-two".