21130827152 has 20 divisors (see below), whose sum is σ = 41080717020. Its totient is φ = 10529351808.

The previous prime is 21130827131. The next prime is 21130827187. The reversal of 21130827152 is 25172803112.

It can be written as a sum of positive squares in 2 ways, for example, as 14997431296 + 6133395856 = 122464^2 + 78316^2 .

It is a super-2 number, since 2×21130827152² (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 3 ways as a sum of consecutive naturals, for example, 2249027 + ... + 2258402.

It is an arithmetic number, because the mean of its divisors is an integer number (2054035851).

Almost surely, 2^21130827152 is an apocalyptic number.

It is an amenable number.

21130827152 is a deficient number, since it is larger than the sum of its proper divisors (19949889868).

21130827152 is a wasteful number, since it uses less digits than its factorization.

21130827152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507730 (or 4507724 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The spelling of 21130827152 in words is "twenty-one billion, one hundred thirty million, eight hundred twenty-seven thousand, one hundred fifty-two".