20155100266731 has 32 divisors (see below), whose sum is σ = 27839377054720. Its totient is φ = 12962296698624.

The previous prime is 20155100266711. The next prime is 20155100266751. The reversal of 20155100266731 is 13766200155102.

It is an interprime number because it is at equal distance from previous prime (20155100266711) and next prime (20155100266751).

It is not a de Polignac number, because 20155100266731 - 2²⁶ = 20155033157867 is a prime.

It is a super-2 number, since 2×20155100266731² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20155100266731.

It is not an unprimeable number, because it can be changed into a prime (20155100266711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2111310 + ... + 6690876.

It is an arithmetic number, because the mean of its divisors is an integer number (869980532960).

Almost surely, 2^{20155100266731} is an apocalyptic number.

20155100266731 is a deficient number, since it is larger than the sum of its proper divisors (7684276787989).

20155100266731 is a wasteful number, since it uses less digits than its factorization.

20155100266731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580035.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 20155100266731 in words is "twenty trillion, one hundred fifty-five billion, one hundred million, two hundred sixty-six thousand, seven hundred thirty-one".