20950187 has 2 divisors, whose sum is σ = 20950188. Its totient is φ = 20950186.

The previous prime is 20950169. The next prime is 20950201. The reversal of 20950187 is 78105902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20950187 - 2¹⁰ = 20949163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20950147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10475093 + 10475094.

It is an arithmetic number, because the mean of its divisors is an integer number (10475094).

Almost surely, 2^20950187 is an apocalyptic number.

20950187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20950187 is an equidigital number, since it uses as much as digits as its factorization.

20950187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 20950187 is about 4577.1374241987. The cubic root of 20950187 is about 275.6741016109.

The spelling of 20950187 in words is "twenty million, nine hundred fifty thousand, one hundred eighty-seven".