123415345020 has 96 divisors (see below), whose sum is σ = 379690133760. Its totient is φ = 29703605760.

The previous prime is 123415345019. The next prime is 123415345057. The reversal of 123415345020 is 20543514321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580897 + ... + 764376.

It is an arithmetic number, because the mean of its divisors is an integer number (3955105560).

Almost surely, 2^123415345020 is an apocalyptic number.

123415345020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123415345020 is an abundant number, since it is smaller than the sum of its proper divisors (256274788740).

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

123415345020 is a wasteful number, since it uses less digits than its factorization.

123415345020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345435 (or 1345433 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 123415345020 its reverse (20543514321), we get a palindrome (143958859341).

The spelling of 123415345020 in words is "one hundred twenty-three billion, four hundred fifteen million, three hundred forty-five thousand, twenty".