20400443342 has 16 divisors (see below), whose sum is σ = 31628282112. Its totient is φ = 9862912440.

The previous prime is 20400443339. The next prime is 20400443351. The reversal of 20400443342 is 24334400402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299584 + ... + 1315187.

It is an arithmetic number, because the mean of its divisors is an integer number (1976767632).

Almost surely, 2^20400443342 is an apocalyptic number.

20400443342 is a deficient number, since it is larger than the sum of its proper divisors (11227838770).

20400443342 is a wasteful number, since it uses less digits than its factorization.

20400443342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614903.

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 20400443342 its reverse (24334400402), we get a palindrome (44734843744).

The spelling of 20400443342 in words is "twenty billion, four hundred million, four hundred forty-three thousand, three hundred forty-two".