20400123413042 has 16 divisors (see below), whose sum is σ = 31057622665440. Its totient is φ = 10047589567488.

The previous prime is 20400123413039. The next prime is 20400123413051. The reversal of 20400123413042 is 24031432100402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4127309 + ... + 7604927.

It is an arithmetic number, because the mean of its divisors is an integer number (1941101416590).

Almost surely, 2^{20400123413042} is an apocalyptic number.

20400123413042 is a deficient number, since it is larger than the sum of its proper divisors (10657499252398).

20400123413042 is a wasteful number, since it uses less digits than its factorization.

20400123413042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521465.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20400123413042 its reverse (24031432100402), we get a palindrome (44431555513444).

The spelling of 20400123413042 in words is "twenty trillion, four hundred billion, one hundred twenty-three million, four hundred thirteen thousand, forty-two".