12442154520 has 64 divisors (see below), whose sum is σ = 38949361920. Its totient is φ = 3173650304.

The previous prime is 12442154489. The next prime is 12442154537. The reversal of 12442154520 is 2545124421.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2251254 + ... + 2256773.

It is an arithmetic number, because the mean of its divisors is an integer number (608583780).

Almost surely, 2^12442154520 is an apocalyptic number.

12442154520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12442154520 is an abundant number, since it is smaller than the sum of its proper divisors (26507207400).

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

12442154520 is a wasteful number, since it uses less digits than its factorization.

12442154520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508064 (or 4508060 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 12442154520 its reverse (2545124421), we get a palindrome (14987278941).

The spelling of 12442154520 in words is "twelve billion, four hundred forty-two million, one hundred fifty-four thousand, five hundred twenty".