20468872 has 8 divisors (see below), whose sum is σ = 38379150. Its totient is φ = 10234432.

The previous prime is 20468869. The next prime is 20468893. The reversal of 20468872 is 27886402.

It can be written as a sum of positive squares in only one way, i.e., 20304036 + 164836 = 4506^2 + 406^2 .

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

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1279297 + ... + 1279312.

Almost surely, 2^20468872 is an apocalyptic number.

It is an amenable number.

20468872 is a deficient number, since it is larger than the sum of its proper divisors (17910278).

20468872 is a wasteful number, since it uses less digits than its factorization.

20468872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558615 (or 2558611 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 20468872 is about 4524.2537506201. The cubic root of 20468872 is about 273.5465888125.

The spelling of 20468872 in words is "twenty million, four hundred sixty-eight thousand, eight hundred seventy-two".