21024324244220 has 72 divisors (see below), whose sum is σ = 48532645787472. Its totient is φ = 7644744828160.

The previous prime is 21024324244211. The next prime is 21024324244229. The reversal of 21024324244220 is 2244242342012.

It is an interprime number because it is at equal distance from previous prime (21024324244211) and next prime (21024324244229).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024324244229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40950224 + ... + 41460456.

It is an arithmetic number, because the mean of its divisors is an integer number (674064524826).

Almost surely, 2^{21024324244220} is an apocalyptic number.

21024324244220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21024324244220 is an abundant number, since it is smaller than the sum of its proper divisors (27508321543252).

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

21024324244220 is a wasteful number, since it uses less digits than its factorization.

21024324244220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527291 (or 527278 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 21024324244220 its reverse (2244242342012), we get a palindrome (23268566586232).

The spelling of 21024324244220 in words is "twenty-one trillion, twenty-four billion, three hundred twenty-four million, two hundred forty-four thousand, two hundred twenty".