20159941 has 2 divisors, whose sum is σ = 20159942. Its totient is φ = 20159940.

The previous prime is 20159939. The next prime is 20159947. The reversal of 20159941 is 14995102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13764100 + 6395841 = 3710^2 + 2529^2 .

It is a cyclic number.

It is not a de Polignac number, because 20159941 - 2¹ = 20159939 is a prime.

It is a super-2 number, since 2×20159941² = 812846442246962, which contains 22 as substring.

Together with 20159939, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20159947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10079970 + 10079971.

It is an arithmetic number, because the mean of its divisors is an integer number (10079971).

Almost surely, 2^20159941 is an apocalyptic number.

It is an amenable number.

20159941 is a deficient number, since it is larger than the sum of its proper divisors (1).

20159941 is an equidigital number, since it uses as much as digits as its factorization.

20159941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 20159941 is about 4489.9822939517. The cubic root of 20159941 is about 272.1634191343.

The spelling of 20159941 in words is "twenty million, one hundred fifty-nine thousand, nine hundred forty-one".