20002165672 has 8 divisors (see below), whose sum is σ = 37504060650. Its totient is φ = 10001082832.

The previous prime is 20002165669. The next prime is 20002165691. The reversal of 20002165672 is 27656120002.

It can be written as a sum of positive squares in only one way, i.e., 18448702276 + 1553463396 = 135826^2 + 39414^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×20002165672³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250135347 + ... + 1250135362.

Almost surely, 2^20002165672 is an apocalyptic number.

It is an amenable number.

20002165672 is a deficient number, since it is larger than the sum of its proper divisors (17501894978).

20002165672 is a wasteful number, since it uses less digits than its factorization.

20002165672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500270715 (or 2500270711 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

Adding to 20002165672 its reverse (27656120002), we get a palindrome (47658285674).

The spelling of 20002165672 in words is "twenty billion, two million, one hundred sixty-five thousand, six hundred seventy-two".