12993461840 has 40 divisors (see below), whose sum is σ = 30342924000. Its totient is φ = 5174481536.

The previous prime is 12993461813. The next prime is 12993461843. The reversal of 12993461840 is 4816439921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12993461843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339590 + ... + 375909.

It is an arithmetic number, because the mean of its divisors is an integer number (758573100).

Almost surely, 2^12993461840 is an apocalyptic number.

12993461840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12993461840 is an abundant number, since it is smaller than the sum of its proper divisors (17349462160).

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

12993461840 is a wasteful number, since it uses less digits than its factorization.

12993461840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715739 (or 715733 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 12993461840 in words is "twelve billion, nine hundred ninety-three million, four hundred sixty-one thousand, eight hundred forty".