21410214220 has 96 divisors (see below), whose sum is σ = 47903788800. Its totient is φ = 8015065344.

The previous prime is 21410214197. The next prime is 21410214251. The reversal of 21410214220 is 2241201412.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24924151 + ... + 24925009.

It is an arithmetic number, because the mean of its divisors is an integer number (498997800).

Almost surely, 2^21410214220 is an apocalyptic number.

21410214220 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 21410214220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23951894400).

21410214220 is an abundant number, since it is smaller than the sum of its proper divisors (26493574580).

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

21410214220 is a wasteful number, since it uses less digits than its factorization.

21410214220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607 (or 1605 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21410214220 its reverse (2241201412), we get a palindrome (23651415632).

The spelling of 21410214220 in words is "twenty-one billion, four hundred ten million, two hundred fourteen thousand, two hundred twenty".