21303858220 has 24 divisors (see below), whose sum is σ = 44860019904. Its totient is φ = 8498320896.

The previous prime is 21303858203. The next prime is 21303858221. The reversal of 21303858220 is 2285830312.

It is not an unprimeable number, because it can be changed into a prime (21303858221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1443877 + ... + 1458556.

It is an arithmetic number, because the mean of its divisors is an integer number (1869167496).

Almost surely, 2^21303858220 is an apocalyptic number.

21303858220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21303858220 is an abundant number, since it is smaller than the sum of its proper divisors (23556161684).

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

21303858220 is a wasteful number, since it uses less digits than its factorization.

21303858220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902809 (or 2902807 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 21303858220 in words is "twenty-one billion, three hundred three million, eight hundred fifty-eight thousand, two hundred twenty".