21050036000 has 96 divisors (see below), whose sum is σ = 59108579712. Its totient is φ = 7217145600.

The previous prime is 21050035997. The next prime is 21050036009. The reversal of 21050036000 is 63005012.

It is a self number, because there is not a number n which added to its sum of digits gives 21050036000.

It is not an unprimeable number, because it can be changed into a prime (21050036009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347894 + ... + 403893.

It is an arithmetic number, because the mean of its divisors is an integer number (615714372).

Almost surely, 2^21050036000 is an apocalyptic number.

21050036000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21050036000 is an abundant number, since it is smaller than the sum of its proper divisors (38058543712).

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

21050036000 is an equidigital number, since it uses as much as digits as its factorization.

21050036000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751819 (or 751801 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The spelling of 21050036000 in words is "twenty-one billion, fifty million, thirty-six thousand".