12451806920 has 64 divisors (see below), whose sum is σ = 32065113600. Its totient is φ = 4263033600.

The previous prime is 12451806919. The next prime is 12451806923. The reversal of 12451806920 is 2960815421.

It is not an unprimeable number, because it can be changed into a prime (12451806923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164561 + ... + 227999.

It is an arithmetic number, because the mean of its divisors is an integer number (501017400).

Almost surely, 2^12451806920 is an apocalyptic number.

12451806920 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 12451806920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16032556800).

12451806920 is an abundant number, since it is smaller than the sum of its proper divisors (19613306680).

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

12451806920 is a wasteful number, since it uses less digits than its factorization.

12451806920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64158 (or 64154 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 12451806920 in words is "twelve billion, four hundred fifty-one million, eight hundred six thousand, nine hundred twenty".