12345505020 has 36 divisors (see below), whose sum is σ = 37448032440. Its totient is φ = 3292134624.

The previous prime is 12345504991. The next prime is 12345505049. The reversal of 12345505020 is 2050554321.

It is a happy number.

12345505020 is a `hidden beast` number, since 12 + 34 + 550 + 50 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (12345504991) and next prime (12345505049).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12345505020² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34292890 + ... + 34293249.

Almost surely, 2^12345505020 is an apocalyptic number.

12345505020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12345505020 is an abundant number, since it is smaller than the sum of its proper divisors (25102527420).

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

12345505020 is a wasteful number, since it uses less digits than its factorization.

12345505020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68586154 (or 68586149 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The spelling of 12345505020 in words is "twelve billion, three hundred forty-five million, five hundred five thousand, twenty".