20402442342 has 24 divisors (see below), whose sum is σ = 44293899000. Its totient is φ = 6787182240.

The previous prime is 20402442341. The next prime is 20402442343. The reversal of 20402442342 is 24324420402.

20402442342 is a `hidden beast` number, since 20 + 402 + 4 + 4 + 234 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20402442341) and next prime (20402442343).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402442341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1126759 + ... + 1144722.

It is an arithmetic number, because the mean of its divisors is an integer number (1845579125).

Almost surely, 2^20402442342 is an apocalyptic number.

20402442342 is an abundant number, since it is smaller than the sum of its proper divisors (23891456658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20402442342 is a wasteful number, since it uses less digits than its factorization.

20402442342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271988 (or 2271985 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 20402442342 its reverse (24324420402), we get a palindrome (44726862744).

The spelling of 20402442342 in words is "twenty billion, four hundred two million, four hundred forty-two thousand, three hundred forty-two".