20736531134578 has 32 divisors (see below), whose sum is σ = 36248343830784. Its totient is φ = 8712354710592.

The previous prime is 20736531134521. The next prime is 20736531134593. The reversal of 20736531134578 is 87543113563702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10378350 + ... + 12214057.

It is an arithmetic number, because the mean of its divisors is an integer number (1132760744712).

Almost surely, 2^{20736531134578} is an apocalyptic number.

20736531134578 is a deficient number, since it is larger than the sum of its proper divisors (15511812696206).

20736531134578 is a wasteful number, since it uses less digits than its factorization.

20736531134578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22593706.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 20736531134578 in words is "twenty trillion, seven hundred thirty-six billion, five hundred thirty-one million, one hundred thirty-four thousand, five hundred seventy-eight".