21452025255320 has 192 divisors, whose sum is σ = 54659791146240. Its totient is φ = 7565942799360.

The previous prime is 21452025255307. The next prime is 21452025255343. The reversal of 21452025255320 is 2355252025412.

It is a super-2 number, since 2×21452025255320² (a number of 27 digits) contains 22 as substring.

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, 56579417 + ... + 56957303.

It is an arithmetic number, because the mean of its divisors is an integer number (284686412220).

Almost surely, 2^{21452025255320} is an apocalyptic number.

21452025255320 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 21452025255320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27329895573120).

21452025255320 is an abundant number, since it is smaller than the sum of its proper divisors (33207765890920).

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

21452025255320 is a wasteful number, since it uses less digits than its factorization.

21452025255320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378274 (or 378259 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 21452025255320 in words is "twenty-one trillion, four hundred fifty-two billion, twenty-five million, two hundred fifty-five thousand, three hundred twenty".