21250640300 has 108 divisors (see below), whose sum is σ = 48931644216. Its totient is φ = 8005670400.

The previous prime is 21250640287. The next prime is 21250640317. The reversal of 21250640300 is 304605212.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3445019 + ... + 3451181.

Almost surely, 2^21250640300 is an apocalyptic number.

21250640300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21250640300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24465822108).

21250640300 is an abundant number, since it is smaller than the sum of its proper divisors (27681003916).

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

21250640300 is a wasteful number, since it uses less digits than its factorization.

21250640300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6276 (or 6240 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The spelling of 21250640300 in words is "twenty-one billion, two hundred fifty million, six hundred forty thousand, three hundred".