20402204242 has 32 divisors (see below), whose sum is σ = 35336787840. Its totient is φ = 8653568640.

The previous prime is 20402204233. The next prime is 20402204267. The reversal of 20402204242 is 24240220402.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 1655142 + ... + 1667422.

It is an arithmetic number, because the mean of its divisors is an integer number (1104274620).

Almost surely, 2^20402204242 is an apocalyptic number.

20402204242 is a deficient number, since it is larger than the sum of its proper divisors (14934583598).

20402204242 is a wasteful number, since it uses less digits than its factorization.

20402204242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13506.

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

Adding to 20402204242 its reverse (24240220402), we get a palindrome (44642424644).

The spelling of 20402204242 in words is "twenty billion, four hundred two million, two hundred four thousand, two hundred forty-two".