20400123413043 has 32 divisors (see below), whose sum is σ = 33860974725120. Its totient is φ = 12029556797280.

The previous prime is 20400123413039. The next prime is 20400123413051. The reversal of 20400123413043 is 34031432100402.

20400123413043 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 0 + 12 + 341 + 304 + 3 = 666.

It is not a de Polignac number, because 20400123413043 - 2² = 20400123413039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20400123412998 and 20400123413016.

It is not an unprimeable number, because it can be changed into a prime (20400123413083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 928195555 + ... + 928217532.

It is an arithmetic number, because the mean of its divisors is an integer number (1058155460160).

Almost surely, 2^{20400123413043} is an apocalyptic number.

20400123413043 is a deficient number, since it is larger than the sum of its proper divisors (13460851312077).

20400123413043 is a wasteful number, since it uses less digits than its factorization.

20400123413043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856413144 (or 1856413138 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 20400123413043 its reverse (34031432100402), we get a palindrome (54431555513445).

The spelling of 20400123413043 in words is "twenty trillion, four hundred billion, one hundred twenty-three million, four hundred thirteen thousand, forty-three".