12946903920 has 120 divisors (see below), whose sum is σ = 45090457776. Its totient is φ = 3452502528.

The previous prime is 12946903919. The next prime is 12946903969. The reversal of 12946903920 is 2930964921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×12946903920² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 313557 + ... + 352436.

Almost surely, 2^12946903920 is an apocalyptic number.

12946903920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12946903920 is an abundant number, since it is smaller than the sum of its proper divisors (32143553856).

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

12946903920 is an equidigital number, since it uses as much as digits as its factorization.

12946903920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666021 (or 666003 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 12946903920 in words is "twelve billion, nine hundred forty-six million, nine hundred three thousand, nine hundred twenty".