21255360310 has 32 divisors (see below), whose sum is σ = 38578617792. Its totient is φ = 8431543680.

The previous prime is 21255360307. The next prime is 21255360331. The reversal of 21255360310 is 1306355212.

It is a super-2 number, since 2×21255360310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595324 + ... + 630016.

It is an arithmetic number, because the mean of its divisors is an integer number (1205581806).

Almost surely, 2^21255360310 is an apocalyptic number.

21255360310 is a deficient number, since it is larger than the sum of its proper divisors (17323257482).

21255360310 is a wasteful number, since it uses less digits than its factorization.

21255360310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35208.

The product of its (nonzero) digits is 5400, while the sum is 28.

The spelling of 21255360310 in words is "twenty-one billion, two hundred fifty-five million, three hundred sixty thousand, three hundred ten".