20219893 has 2 divisors, whose sum is σ = 20219894. Its totient is φ = 20219892.

The previous prime is 20219891. The next prime is 20219911. The reversal of 20219893 is 39891202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14730244 + 5489649 = 3838^2 + 2343^2 .

It is a cyclic number.

It is not a de Polignac number, because 20219893 - 2¹ = 20219891 is a prime.

Together with 20219891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20219891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10109946 + 10109947.

It is an arithmetic number, because the mean of its divisors is an integer number (10109947).

Almost surely, 2^20219893 is an apocalyptic number.

It is an amenable number.

20219893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20219893 is an equidigital number, since it uses as much as digits as its factorization.

20219893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 20219893 is about 4496.6535334624. The cubic root of 20219893 is about 272.4329403204.

It can be divided in two parts, 20219 and 893, that added together give a palindrome (21112).

The spelling of 20219893 in words is "twenty million, two hundred nineteen thousand, eight hundred ninety-three".