21414500220 has 24 divisors (see below), whose sum is σ = 59960600784. Its totient is φ = 5710533376.

The previous prime is 21414500201. The next prime is 21414500243. The reversal of 21414500220 is 2200541412.

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, 178454109 + ... + 178454228.

It is an arithmetic number, because the mean of its divisors is an integer number (2498358366).

Almost surely, 2^21414500220 is an apocalyptic number.

21414500220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21414500220 is an abundant number, since it is smaller than the sum of its proper divisors (38546100564).

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

21414500220 is a wasteful number, since it uses less digits than its factorization.

21414500220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356908349 (or 356908347 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The spelling of 21414500220 in words is "twenty-one billion, four hundred fourteen million, five hundred thousand, two hundred twenty".