20213275765 has 8 divisors (see below), whose sum is σ = 24441091488. Its totient is φ = 16047180240.

The previous prime is 20213275763. The next prime is 20213275777. The reversal of 20213275765 is 56757231202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20213275765 - 2¹ = 20213275763 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 (20213275763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15429327 + ... + 15430636.

It is an arithmetic number, because the mean of its divisors is an integer number (3055136436).

Almost surely, 2^20213275765 is an apocalyptic number.

It is an amenable number.

20213275765 is a deficient number, since it is larger than the sum of its proper divisors (4227815723).

20213275765 is a wasteful number, since it uses less digits than its factorization.

20213275765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30860099.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 20213275765 in words is "twenty billion, two hundred thirteen million, two hundred seventy-five thousand, seven hundred sixty-five".