20889467 has 2 divisors, whose sum is σ = 20889468. Its totient is φ = 20889466.

The previous prime is 20889439. The next prime is 20889487. The reversal of 20889467 is 76498802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20889467 - 2²² = 16695163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20889437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10444733 + 10444734.

It is an arithmetic number, because the mean of its divisors is an integer number (10444734).

Almost surely, 2^20889467 is an apocalyptic number.

20889467 is a deficient number, since it is larger than the sum of its proper divisors (1).

20889467 is an equidigital number, since it uses as much as digits as its factorization.

20889467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 20889467 is about 4570.4996444590. The cubic root of 20889467 is about 275.4075148251.

The spelling of 20889467 in words is "twenty million, eight hundred eighty-nine thousand, four hundred sixty-seven".