20123440104 has 32 divisors (see below), whose sum is σ = 51161292000. Its totient is φ = 6594121152.

The previous prime is 20123440093. The next prime is 20123440111. The reversal of 20123440104 is 40104432102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7104319 + ... + 7107150.

It is an arithmetic number, because the mean of its divisors is an integer number (1598790375).

Almost surely, 2^20123440104 is an apocalyptic number.

20123440104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20123440104 is an abundant number, since it is smaller than the sum of its proper divisors (31037851896).

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

20123440104 is a wasteful number, since it uses less digits than its factorization.

20123440104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14211537 (or 14211533 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20123440104 its reverse (40104432102), we get a palindrome (60227872206).

The spelling of 20123440104 in words is "twenty billion, one hundred twenty-three million, four hundred forty thousand, one hundred four".