21623125300 has 144 divisors (see below), whose sum is σ = 55060225920. Its totient is φ = 7216128000.

The previous prime is 21623125289. The next prime is 21623125327. The reversal of 21623125300 is 352132612.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23275236 + ... + 23276164.

It is an arithmetic number, because the mean of its divisors is an integer number (382362680).

Almost surely, 2^21623125300 is an apocalyptic number.

21623125300 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 21623125300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27530112960).

21623125300 is an abundant number, since it is smaller than the sum of its proper divisors (33437100620).

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

21623125300 is a wasteful number, since it uses less digits than its factorization.

21623125300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802 (or 1795 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21623125300 its reverse (352132612), we get a palindrome (21975257912).

It can be divided in two parts, 2162312 and 5300, that added together give a palindrome (2167612).

The spelling of 21623125300 in words is "twenty-one billion, six hundred twenty-three million, one hundred twenty-five thousand, three hundred".