12420350040 has 64 divisors (see below), whose sum is σ = 42584060160. Its totient is φ = 2838936960.

The previous prime is 12420350017. The next prime is 12420350099. The reversal of 12420350040 is 4005302421.

It is a super-2 number, since 2×12420350040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12420349989 and 12420350016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7392226 + ... + 7393905.

It is an arithmetic number, because the mean of its divisors is an integer number (665375940).

Almost surely, 2^12420350040 is an apocalyptic number.

12420350040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12420350040 is an abundant number, since it is smaller than the sum of its proper divisors (30163710120).

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

12420350040 is a wasteful number, since it uses less digits than its factorization.

12420350040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14786152 (or 14786148 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 12420350040 its reverse (4005302421), we get a palindrome (16425652461).

The spelling of 12420350040 in words is "twelve billion, four hundred twenty million, three hundred fifty thousand, forty".