12445154420 has 24 divisors (see below), whose sum is σ = 26167163400. Its totient is φ = 4971901952.

The previous prime is 12445154411. The next prime is 12445154431. The reversal of 12445154420 is 2445154421.

It can be written as a sum of positive squares in 4 ways, for example, as 2612845456 + 9832308964 = 51116^2 + 99158^2 .

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, 368405 + ... + 400764.

It is an arithmetic number, because the mean of its divisors is an integer number (1090298475).

Almost surely, 2^12445154420 is an apocalyptic number.

12445154420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12445154420 is an abundant number, since it is smaller than the sum of its proper divisors (13722008980).

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

12445154420 is a wasteful number, since it uses less digits than its factorization.

12445154420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769987 (or 769985 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

Subtracting from 12445154420 its reverse (2445154421), we obtain a palindrome (9999999999).

It can be divided in two parts, 124451 and 54420, that added together give a palindrome (178871).

The spelling of 12445154420 in words is "twelve billion, four hundred forty-five million, one hundred fifty-four thousand, four hundred twenty".