20004400042 has 32 divisors (see below), whose sum is σ = 33876792000. Its totient is φ = 8775849600.

The previous prime is 20004400027. The next prime is 20004400093. The reversal of 20004400042 is 24000440002.

It is a junction number, because it is equal to n+sod(n) for n = 20004399989 and 20004400025.

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, 2195917 + ... + 2205007.

It is an arithmetic number, because the mean of its divisors is an integer number (1058649750).

Almost surely, 2^20004400042 is an apocalyptic number.

20004400042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20004400042 is a deficient number, since it is larger than the sum of its proper divisors (13872391958).

20004400042 is a wasteful number, since it uses less digits than its factorization.

20004400042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12582.

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20004400042 its reverse (24000440002), we get a palindrome (44004840044).

The spelling of 20004400042 in words is "twenty billion, four million, four hundred thousand, forty-two".