12154431040 has 56 divisors (see below), whose sum is σ = 29064021120. Its totient is φ = 4841399808.

The previous prime is 12154431013. The next prime is 12154431053. The reversal of 12154431040 is 4013445121.

It is a super-2 number, since 2×12154431040² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12154430996 and 12154431014.

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, 2982 + ... + 155941.

Almost surely, 2^12154431040 is an apocalyptic number.

12154431040 is a gapful number since it is divisible by the number (10) 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 12154431040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14532010560).

12154431040 is an abundant number, since it is smaller than the sum of its proper divisors (16909590080).

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

12154431040 is a wasteful number, since it uses less digits than its factorization.

12154431040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159179 (or 159169 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 12154431040 its reverse (4013445121), we get a palindrome (16167876161).

The spelling of 12154431040 in words is "twelve billion, one hundred fifty-four million, four hundred thirty-one thousand, forty".