20342440402 has 16 divisors (see below), whose sum is σ = 32126135040. Its totient is φ = 9633945168.

The previous prime is 20342440399. The next prime is 20342440429. The reversal of 20342440402 is 20404424302.

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, 145983 + ... + 248989.

It is an arithmetic number, because the mean of its divisors is an integer number (2007883440).

Almost surely, 2^20342440402 is an apocalyptic number.

20342440402 is a deficient number, since it is larger than the sum of its proper divisors (11783694638).

20342440402 is a wasteful number, since it uses less digits than its factorization.

20342440402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108225.

The product of its (nonzero) digits is 6144, while the sum is 25.

Adding to 20342440402 its reverse (20404424302), we get a palindrome (40746864704).

The spelling of 20342440402 in words is "twenty billion, three hundred forty-two million, four hundred forty thousand, four hundred two".