21536200625034 has 16 divisors (see below), whose sum is σ = 43072816691520. Its totient is φ = 7178664301440.

The previous prime is 21536200624993. The next prime is 21536200625083. The reversal of 21536200625034 is 43052600263512.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21536200624983 and 21536200625001.

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, 16634119 + ... + 17882010.

It is an arithmetic number, because the mean of its divisors is an integer number (2692051043220).

Almost surely, 2^{21536200625034} is an apocalyptic number.

21536200625034 is an abundant number, since it is smaller than the sum of its proper divisors (21536616066486).

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

21536200625034 is a wasteful number, since it uses less digits than its factorization.

21536200625034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34620125.

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 21536200625034 its reverse (43052600263512), we get a palindrome (64588800888546).

The spelling of 21536200625034 in words is "twenty-one trillion, five hundred thirty-six billion, two hundred million, six hundred twenty-five thousand, thirty-four".