21252674800 has 120 divisors (see below), whose sum is σ = 59093043200. Its totient is φ = 7194320640.

The previous prime is 21252674777. The next prime is 21252674917. The reversal of 21252674800 is 847625212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21252674800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173161 + ... + 269239.

Almost surely, 2^21252674800 is an apocalyptic number.

21252674800 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 21252674800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29546521600).

21252674800 is an abundant number, since it is smaller than the sum of its proper divisors (37840368400).

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

21252674800 is a wasteful number, since it uses less digits than its factorization.

21252674800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96183 (or 96172 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 21252674800 in words is "twenty-one billion, two hundred fifty-two million, six hundred seventy-four thousand, eight hundred".