20404342124 has 12 divisors (see below), whose sum is σ = 35765289000. Its totient is φ = 10185688128.

The previous prime is 20404342099. The next prime is 20404342129. The reversal of 20404342124 is 42124340402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20404342093 and 20404342102.

It is not an unprimeable number, because it can be changed into a prime (20404342129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4117949 + ... + 4122900.

It is an arithmetic number, because the mean of its divisors is an integer number (2980440750).

Almost surely, 2^20404342124 is an apocalyptic number.

It is an amenable number.

20404342124 is a deficient number, since it is larger than the sum of its proper divisors (15360946876).

20404342124 is a wasteful number, since it uses less digits than its factorization.

20404342124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8241472 (or 8241470 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20404342124 its reverse (42124340402), we get a palindrome (62528682526).

The spelling of 20404342124 in words is "twenty billion, four hundred four million, three hundred forty-two thousand, one hundred twenty-four".