21214162220 has 24 divisors (see below), whose sum is σ = 44982266784. Its totient is φ = 8403278976.

The previous prime is 21214162219. The next prime is 21214162241. The reversal of 21214162220 is 2226141212.

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, 5147009 + ... + 5151128.

It is an arithmetic number, because the mean of its divisors is an integer number (1874261116).

Almost surely, 2^21214162220 is an apocalyptic number.

21214162220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21214162220 is an abundant number, since it is smaller than the sum of its proper divisors (23768104564).

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

21214162220 is a wasteful number, since it uses less digits than its factorization.

21214162220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10298249 (or 10298247 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The spelling of 21214162220 in words is "twenty-one billion, two hundred fourteen million, one hundred sixty-two thousand, two hundred twenty".