20001959 has 2 divisors, whose sum is σ = 20001960. Its totient is φ = 20001958.

The previous prime is 20001937. The next prime is 20001977. The reversal of 20001959 is 95910002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001959 - 2⁸ = 20001703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000979 + 10000980.

It is an arithmetic number, because the mean of its divisors is an integer number (10000980).

Almost surely, 2^20001959 is an apocalyptic number.

20001959 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001959 is an equidigital number, since it uses as much as digits as its factorization.

20001959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 20001959 is about 4472.3549724949. The cubic root of 20001959 is about 271.4506239437.

The spelling of 20001959 in words is "twenty million, one thousand, nine hundred fifty-nine".