20101672 has 8 divisors (see below), whose sum is σ = 37690650. Its totient is φ = 10050832.

The previous prime is 20101663. The next prime is 20101673. The reversal of 20101672 is 27610102.

It can be written as a sum of positive squares in only one way, i.e., 10329796 + 9771876 = 3214^2 + 3126^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20101673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256347 + ... + 1256362.

Almost surely, 2^20101672 is an apocalyptic number.

It is an amenable number.

20101672 is a deficient number, since it is larger than the sum of its proper divisors (17588978).

20101672 is a wasteful number, since it uses less digits than its factorization.

20101672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512715 (or 2512711 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 20101672 is about 4483.4888201043. The cubic root of 20101672 is about 271.9009515369.

Adding to 20101672 its reverse (27610102), we get a palindrome (47711774).

The spelling of 20101672 in words is "twenty million, one hundred one thousand, six hundred seventy-two".