12434171920 has 40 divisors (see below), whose sum is σ = 29842018560. Its totient is φ = 4813226880.

The previous prime is 12434171917. The next prime is 12434171987. The reversal of 12434171920 is 2917143421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×12434171920² (a number of 21 digits) contains 22 as substring.

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, 2504410 + ... + 2509369.

It is an arithmetic number, because the mean of its divisors is an integer number (746050464).

Almost surely, 2^12434171920 is an apocalyptic number.

12434171920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12434171920 is an abundant number, since it is smaller than the sum of its proper divisors (17407846640).

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

12434171920 is a wasteful number, since it uses less digits than its factorization.

12434171920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013823 (or 5013817 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 12434171920 in words is "twelve billion, four hundred thirty-four million, one hundred seventy-one thousand, nine hundred twenty".