20135542864039 has 16 divisors (see below), whose sum is σ = 21019099126464. Its totient is φ = 19252663091200.

The previous prime is 20135542863983. The next prime is 20135542864069. The reversal of 20135542864039 is 93046824553102.

It is a cyclic number.

It is not a de Polignac number, because 20135542864039 - 2²⁵ = 20135509309607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135542864069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764985999 + ... + 765012319.

It is an arithmetic number, because the mean of its divisors is an integer number (1313693695404).

Almost surely, 2^{20135542864039} is an apocalyptic number.

20135542864039 is a deficient number, since it is larger than the sum of its proper divisors (883556262425).

20135542864039 is a wasteful number, since it uses less digits than its factorization.

20135542864039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37898.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 20135542864039 in words is "twenty trillion, one hundred thirty-five billion, five hundred forty-two million, eight hundred sixty-four thousand, thirty-nine".