20404420042 has 16 divisors (see below), whose sum is σ = 31027219200. Its totient is φ = 10062290160.

The previous prime is 20404420037. The next prime is 20404420067. The reversal of 20404420042 is 24002440402.

It is a junction number, because it is equal to n+sod(n) for n = 20404419995 and 20404420022.

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, 80059 + ... + 217297.

It is an arithmetic number, because the mean of its divisors is an integer number (1939201200).

Almost surely, 2^20404420042 is an apocalyptic number.

20404420042 is a deficient number, since it is larger than the sum of its proper divisors (10622799158).

20404420042 is a wasteful number, since it uses less digits than its factorization.

20404420042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138261.

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20404420042 its reverse (24002440402), we get a palindrome (44406860444).

The spelling of 20404420042 in words is "twenty billion, four hundred four million, four hundred twenty thousand, forty-two".