21452025452 has 24 divisors (see below), whose sum is σ = 44104165392. Its totient is φ = 9000849600.

The previous prime is 21452025421. The next prime is 21452025461. The reversal of 21452025452 is 25452025412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18751199 + ... + 18752342.

It is an arithmetic number, because the mean of its divisors is an integer number (1837673558).

Almost surely, 2^21452025452 is an apocalyptic number.

21452025452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21452025452 is an abundant number, since it is smaller than the sum of its proper divisors (22652139940).

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

21452025452 is a wasteful number, since it uses less digits than its factorization.

21452025452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37503569 (or 37503567 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

The spelling of 21452025452 in words is "twenty-one billion, four hundred fifty-two million, twenty-five thousand, four hundred fifty-two".