20884907 has 2 divisors, whose sum is σ = 20884908. Its totient is φ = 20884906.

The previous prime is 20884861. The next prime is 20884921. The reversal of 20884907 is 70948802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20884907 - 2¹⁶ = 20819371 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20884307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10442453 + 10442454.

It is an arithmetic number, because the mean of its divisors is an integer number (10442454).

Almost surely, 2^20884907 is an apocalyptic number.

20884907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20884907 is an equidigital number, since it uses as much as digits as its factorization.

20884907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 20884907 is about 4570.0007658643. Note that the first 3 decimals coincide. The cubic root of 20884907 is about 275.3874736299.

The spelling of 20884907 in words is "twenty million, eight hundred eighty-four thousand, nine hundred seven".