21010514320 has 40 divisors (see below), whose sum is σ = 49016222136. Its totient is φ = 8375513088.

The previous prime is 21010514243. The next prime is 21010514339. The reversal of 21010514320 is 2341501012.

It can be written as a sum of positive squares in 4 ways, for example, as 4360225024 + 16650289296 = 66032^2 + 129036^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 424737 + ... + 471616.

Almost surely, 2^21010514320 is an apocalyptic number.

21010514320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010514320 is an abundant number, since it is smaller than the sum of its proper divisors (28005707816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21010514320 is a wasteful number, since it uses less digits than its factorization.

21010514320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896659 (or 896653 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The spelling of 21010514320 in words is "twenty-one billion, ten million, five hundred fourteen thousand, three hundred twenty".