21210140032 has 48 divisors (see below), whose sum is σ = 44886427020. Its totient is φ = 9981224960.

The previous prime is 21210140011. The next prime is 21210140033. The reversal of 21210140032 is 23004101212.

It is a super-2 number, since 2×21210140032² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 21210139988 and 21210140015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210140033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 249694 + ... + 323677.

Almost surely, 2^21210140032 is an apocalyptic number.

It is an amenable number.

21210140032 is an abundant number, since it is smaller than the sum of its proper divisors (23676286988).

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

21210140032 is an equidigital number, since it uses as much as digits as its factorization.

21210140032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573419 (or 573390 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21210140032 its reverse (23004101212), we get a palindrome (44214241244).

The spelling of 21210140032 in words is "twenty-one billion, two hundred ten million, one hundred forty thousand, thirty-two".