20053871 has 2 divisors, whose sum is σ = 20053872. Its totient is φ = 20053870.

The previous prime is 20053841. The next prime is 20053883. The reversal of 20053871 is 17835002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20053871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20053871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20053801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026935 + 10026936.

It is an arithmetic number, because the mean of its divisors is an integer number (10026936).

Almost surely, 2^20053871 is an apocalyptic number.

20053871 is a deficient number, since it is larger than the sum of its proper divisors (1).

20053871 is an equidigital number, since it uses as much as digits as its factorization.

20053871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20053871 is about 4478.1548655668. The cubic root of 20053871 is about 271.6852571535.

Adding to 20053871 its reverse (17835002), we get a palindrome (37888873).

The spelling of 20053871 in words is "twenty million, fifty-three thousand, eight hundred seventy-one".