20340120442 has 16 divisors (see below), whose sum is σ = 30663115560. Its totient is φ = 10119209472.

The previous prime is 20340120439. The next prime is 20340120457. The reversal of 20340120442 is 24402104302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14629144401 + 5710976041 = 120951^2 + 75571^2 .

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, 291534 + ... + 354502.

Almost surely, 2^20340120442 is an apocalyptic number.

20340120442 is a deficient number, since it is larger than the sum of its proper divisors (10322995118).

20340120442 is a wasteful number, since it uses less digits than its factorization.

20340120442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63777.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20340120442 its reverse (24402104302), we get a palindrome (44742224744).

The spelling of 20340120442 in words is "twenty billion, three hundred forty million, one hundred twenty thousand, four hundred forty-two".