12420154552 has 32 divisors (see below), whose sum is σ = 25122006000. Its totient is φ = 5722585344.

The previous prime is 12420154507. The next prime is 12420154601. The reversal of 12420154552 is 25545102421.

It is a super-3 number, since 3×12420154552³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

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, 40677 + ... + 162772.

Almost surely, 2^12420154552 is an apocalyptic number.

It is an amenable number.

12420154552 is an abundant number, since it is smaller than the sum of its proper divisors (12701851448).

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

12420154552 is a wasteful number, since it uses less digits than its factorization.

12420154552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204055 (or 204051 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 12420154552 its reverse (25545102421), we get a palindrome (37965256973).

The spelling of 12420154552 in words is "twelve billion, four hundred twenty million, one hundred fifty-four thousand, five hundred fifty-two".