20402204042 has 16 divisors (see below), whose sum is σ = 33416064864. Its totient is φ = 9265218000.

The previous prime is 20402204029. The next prime is 20402204083. The reversal of 20402204042 is 24040220402.

It is a super-2 number, since 2×20402204042² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401009 + ... + 449012.

It is an arithmetic number, because the mean of its divisors is an integer number (2088504054).

Almost surely, 2^20402204042 is an apocalyptic number.

20402204042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20402204042 is a deficient number, since it is larger than the sum of its proper divisors (13013860822).

20402204042 is a wasteful number, since it uses less digits than its factorization.

20402204042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851125.

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20402204042 its reverse (24040220402), we get a palindrome (44442424444).

The spelling of 20402204042 in words is "twenty billion, four hundred two million, two hundred four thousand, forty-two".