20523642402234 has 64 divisors (see below), whose sum is σ = 42906614457600. Its totient is φ = 6532366663680.

The previous prime is 20523642402229. The next prime is 20523642402253. The reversal of 20523642402234 is 43220424632502.

It is a junction number, because it is equal to n+sod(n) for n = 20523642402192 and 20523642402201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 570447654 + ... + 570483630.

It is an arithmetic number, because the mean of its divisors is an integer number (670415850900).

Almost surely, 2^{20523642402234} is an apocalyptic number.

20523642402234 is an abundant number, since it is smaller than the sum of its proper divisors (22382972055366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20523642402234 is a wasteful number, since it uses less digits than its factorization.

20523642402234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43095.

The product of its (nonzero) digits is 552960, while the sum is 39.

The spelling of 20523642402234 in words is "twenty trillion, five hundred twenty-three billion, six hundred forty-two million, four hundred two thousand, two hundred thirty-four".