21001035360 has 48 divisors (see below), whose sum is σ = 66153262896. Its totient is φ = 5600275968.

The previous prime is 21001035337. The next prime is 21001035421. The reversal of 21001035360 is 6353010012.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 21875599 + ... + 21876558.

It is an arithmetic number, because the mean of its divisors is an integer number (1378192977).

Almost surely, 2^21001035360 is an apocalyptic number.

21001035360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001035360 is an abundant number, since it is smaller than the sum of its proper divisors (45152227536).

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

21001035360 is a wasteful number, since it uses less digits than its factorization.

21001035360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43752175 (or 43752167 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 21001035360 its reverse (6353010012), we get a palindrome (27354045372).

The spelling of 21001035360 in words is "twenty-one billion, one million, thirty-five thousand, three hundred sixty".