20734031205877 has 4 divisors (see below), whose sum is σ = 22618943133696. Its totient is φ = 18849119278060.

The previous prime is 20734031205869. The next prime is 20734031205883. The reversal of 20734031205877 is 77850213043702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20734031205877 - 2³ = 20734031205869 is a prime.

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 20734031205877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734031205857) 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, 942455963893 + ... + 942455963914.

It is an arithmetic number, because the mean of its divisors is an integer number (5654735783424).

Almost surely, 2^{20734031205877} is an apocalyptic number.

It is an amenable number.

20734031205877 is a deficient number, since it is larger than the sum of its proper divisors (1884911927819).

20734031205877 is a wasteful number, since it uses less digits than its factorization.

20734031205877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884911927818.

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 20734031205877 in words is "twenty trillion, seven hundred thirty-four billion, thirty-one million, two hundred five thousand, eight hundred seventy-seven".