20124100042 has 8 divisors (see below), whose sum is σ = 30206427300. Its totient is φ = 10055290944.

The previous prime is 20124100001. The next prime is 20124100049. The reversal of 20124100042 is 24000142102.

It can be written as a sum of positive squares in 2 ways, for example, as 19988587161 + 135512881 = 141381^2 + 11641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20124099989 and 20124100025.

It is not an unprimeable number, because it can be changed into a prime (20124100049) 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, 3375817 + ... + 3381772.

Almost surely, 2^20124100042 is an apocalyptic number.

20124100042 is a deficient number, since it is larger than the sum of its proper divisors (10082327258).

20124100042 is a wasteful number, since it uses less digits than its factorization.

20124100042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6759080.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20124100042 its reverse (24000142102), we get a palindrome (44124242144).

The spelling of 20124100042 in words is "twenty billion, one hundred twenty-four million, one hundred thousand, forty-two".