21010532310 has 48 divisors (see below), whose sum is σ = 57502514160. Its totient is φ = 5307923520.

The previous prime is 21010532267. The next prime is 21010532363. The reversal of 21010532310 is 1323501012.

21010532310 is a `hidden beast` number, since 2 + 101 + 0 + 532 + 31 + 0 = 666.

It is a super-2 number, since 2×21010532310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6141721 + ... + 6145140.

It is an arithmetic number, because the mean of its divisors is an integer number (1197969045).

Almost surely, 2^21010532310 is an apocalyptic number.

21010532310 is an abundant number, since it is smaller than the sum of its proper divisors (36491981850).

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

21010532310 is a wasteful number, since it uses less digits than its factorization.

21010532310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12286893 (or 12286890 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The spelling of 21010532310 in words is "twenty-one billion, ten million, five hundred thirty-two thousand, three hundred ten".