21003351352 has 64 divisors (see below), whose sum is σ = 43221496320. Its totient is φ = 9529056768.

The previous prime is 21003351323. The next prime is 21003351359. The reversal of 21003351352 is 25315330012.

It is a super-2 number, since 2×21003351352² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003351359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403743 + ... + 452785.

It is an arithmetic number, because the mean of its divisors is an integer number (675335880).

Almost surely, 2^21003351352 is an apocalyptic number.

It is an amenable number.

21003351352 is an abundant number, since it is smaller than the sum of its proper divisors (22218144968).

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

21003351352 is a wasteful number, since it uses less digits than its factorization.

21003351352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49180 (or 49176 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 21003351352 its reverse (25315330012), we get a palindrome (46318681364).

The spelling of 21003351352 in words is "twenty-one billion, three million, three hundred fifty-one thousand, three hundred fifty-two".