20275631764 has 24 divisors (see below), whose sum is σ = 37601159400. Its totient is φ = 9549496320.

The previous prime is 20275631759. The next prime is 20275631767. The reversal of 20275631764 is 46713657202.

It can be written as a sum of positive squares in 4 ways, for example, as 1385328400 + 18890303364 = 37220^2 + 137442^2 .

It is a super-2 number, since 2×20275631764² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20275631764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20275631767) 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, 2126829 + ... + 2136340.

It is an arithmetic number, because the mean of its divisors is an integer number (1566714975).

Almost surely, 2^20275631764 is an apocalyptic number.

It is an amenable number.

20275631764 is a deficient number, since it is larger than the sum of its proper divisors (17325527636).

20275631764 is a wasteful number, since it uses less digits than its factorization.

20275631764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263243 (or 4263241 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 20275631764 in words is "twenty billion, two hundred seventy-five million, six hundred thirty-one thousand, seven hundred sixty-four".