20401423432142 has 16 divisors (see below), whose sum is σ = 31161919450464. Its totient is φ = 10015309248000.

The previous prime is 20401423432109. The next prime is 20401423432157. The reversal of 20401423432142 is 24123432410402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20401423432099 and 20401423432108.

It is a congruent number.

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, 298040459 + ... + 298108902.

It is an arithmetic number, because the mean of its divisors is an integer number (1947619965654).

Almost surely, 2^{20401423432142} is an apocalyptic number.

20401423432142 is a deficient number, since it is larger than the sum of its proper divisors (10760496018322).

20401423432142 is a wasteful number, since it uses less digits than its factorization.

20401423432142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596149675.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 20401423432142 its reverse (24123432410402), we get a palindrome (44524855842544).

The spelling of 20401423432142 in words is "twenty trillion, four hundred one billion, four hundred twenty-three million, four hundred thirty-two thousand, one hundred forty-two".