20404444442 has 16 divisors (see below), whose sum is σ = 30957331680. Its totient is φ = 10085757552.

The previous prime is 20404444439. The next prime is 20404444513. The reversal of 20404444442 is 24444440402.

It is a junction number, because it is equal to n+sod(n) for n = 20404444399 and 20404444408.

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, 9068 + ... + 202215.

It is an arithmetic number, because the mean of its divisors is an integer number (1934833230).

Almost surely, 2^20404444442 is an apocalyptic number.

20404444442 is a deficient number, since it is larger than the sum of its proper divisors (10552887238).

20404444442 is a wasteful number, since it uses less digits than its factorization.

20404444442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211837.

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 20404444442 its reverse (24444440402), we get a palindrome (44848884844).

The spelling of 20404444442 in words is "twenty billion, four hundred four million, four hundred forty-four thousand, four hundred forty-two".