20002951 has 2 divisors, whose sum is σ = 20002952. Its totient is φ = 20002950.

The previous prime is 20002933. The next prime is 20002979. The reversal of 20002951 is 15920002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20002951 - 2⁵ = 20002919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002981) 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, 10001475 + 10001476.

It is an arithmetic number, because the mean of its divisors is an integer number (10001476).

Almost surely, 2^20002951 is an apocalyptic number.

20002951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002951 is an equidigital number, since it uses as much as digits as its factorization.

20002951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20002951 is about 4472.4658746602. The cubic root of 20002951 is about 271.4551114136.

Adding to 20002951 its reverse (15920002), we get a palindrome (35922953).

The spelling of 20002951 in words is "twenty million, two thousand, nine hundred fifty-one".