20401442343 has 12 divisors (see below), whose sum is σ = 29538752568. Its totient is φ = 13568652720.

The previous prime is 20401442339. The next prime is 20401442357. The reversal of 20401442343 is 34324410402.

It is a happy number.

20401442343 is a `hidden beast` number, since 20 + 401 + 4 + 4 + 234 + 3 = 666.

It is not a de Polignac number, because 20401442343 - 2² = 20401442339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401442363) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2688405 + ... + 2695982.

It is an arithmetic number, because the mean of its divisors is an integer number (2461562714).

Almost surely, 2^20401442343 is an apocalyptic number.

20401442343 is a deficient number, since it is larger than the sum of its proper divisors (9137310225).

20401442343 is a wasteful number, since it uses less digits than its factorization.

20401442343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5384814 (or 5384811 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20401442343 its reverse (34324410402), we get a palindrome (54725852745).

The spelling of 20401442343 in words is "twenty billion, four hundred one million, four hundred forty-two thousand, three hundred forty-three".