123007204540 has 48 divisors (see below), whose sum is σ = 290888607744. Its totient is φ = 43286990400.

The previous prime is 123007204531. The next prime is 123007204553. The reversal of 123007204540 is 45402700321.

It is a super-2 number, since 2×123007204540² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123007204499 and 123007204508.

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, 9011304 + ... + 9024943.

It is an arithmetic number, because the mean of its divisors is an integer number (6060179328).

Almost surely, 2^123007204540 is an apocalyptic number.

123007204540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123007204540 is an abundant number, since it is smaller than the sum of its proper divisors (167881403204).

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

123007204540 is a wasteful number, since it uses less digits than its factorization.

123007204540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18036298 (or 18036296 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

Adding to 123007204540 its reverse (45402700321), we get a palindrome (168409904861).

The spelling of 123007204540 in words is "one hundred twenty-three billion, seven million, two hundred four thousand, five hundred forty".