20402443213342 has 32 divisors (see below), whose sum is σ = 31777667460000. Its totient is φ = 9812587954176.

The previous prime is 20402443213283. The next prime is 20402443213393. The reversal of 20402443213342 is 24331234420402.

It is a junction number, because it is equal to n+sod(n) for n = 20402443213298 and 20402443213307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17683009 + ... + 18801427.

It is an arithmetic number, because the mean of its divisors is an integer number (993052108125).

Almost surely, 2^{20402443213342} is an apocalyptic number.

20402443213342 is a deficient number, since it is larger than the sum of its proper divisors (11375224246658).

20402443213342 is a wasteful number, since it uses less digits than its factorization.

20402443213342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119628.

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 20402443213342 its reverse (24331234420402), we get a palindrome (44733677633744).

The spelling of 20402443213342 in words is "twenty trillion, four hundred two billion, four hundred forty-three million, two hundred thirteen thousand, three hundred forty-two".