20539354752001 has 4 divisors (see below), whose sum is σ = 21747552090372. Its totient is φ = 19331157413632.

The previous prime is 20539354751999. The next prime is 20539354752043. The reversal of 20539354752001 is 10025745393502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15351546791025 + 5187807960976 = 3918105^2 + 2277676^2 .

It is a cyclic number.

It is not a de Polignac number, because 20539354752001 - 2¹ = 20539354751999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20539354752061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604098669160 + ... + 604098669193.

It is an arithmetic number, because the mean of its divisors is an integer number (5436888022593).

Almost surely, 2^{20539354752001} is an apocalyptic number.

It is an amenable number.

20539354752001 is a deficient number, since it is larger than the sum of its proper divisors (1208197338371).

20539354752001 is a wasteful number, since it uses less digits than its factorization.

20539354752001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208197338370.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 20539354752001 in words is "twenty trillion, five hundred thirty-nine billion, three hundred fifty-four million, seven hundred fifty-two thousand, one".