201423421452 has 192 divisors, whose sum is σ = 574370818560. Its totient is φ = 54144921600.

The previous prime is 201423421439. The next prime is 201423421499. The reversal of 201423421452 is 254124324102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8387302 + ... + 8411282.

It is an arithmetic number, because the mean of its divisors is an integer number (2991514680).

Almost surely, 2^201423421452 is an apocalyptic number.

201423421452 is a gapful number since it is divisible by the number (22) 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 201423421452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287185409280).

201423421452 is an abundant number, since it is smaller than the sum of its proper divisors (372947397108).

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

201423421452 is a wasteful number, since it uses less digits than its factorization.

201423421452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24232 (or 24230 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 201423421452 its reverse (254124324102), we get a palindrome (455547745554).

The spelling of 201423421452 in words is "two hundred one billion, four hundred twenty-three million, four hundred twenty-one thousand, four hundred fifty-two".