20838049 has 2 divisors, whose sum is σ = 20838050. Its totient is φ = 20838048.

The previous prime is 20838047. The next prime is 20838053. The reversal of 20838049 is 94083802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16810000 + 4028049 = 4100^2 + 2007^2 .

It is a cyclic number.

It is not a de Polignac number, because 20838049 - 2¹ = 20838047 is a prime.

It is a super-2 number, since 2×20838049² = 868448572252802, which contains 22 as substring.

Together with 20838047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20838043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10419024 + 10419025.

It is an arithmetic number, because the mean of its divisors is an integer number (10419025).

Almost surely, 2^20838049 is an apocalyptic number.

It is an amenable number.

20838049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20838049 is an equidigital number, since it uses as much as digits as its factorization.

20838049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20838049 is about 4564.8711920491. The cubic root of 20838049 is about 275.1813635593.

The spelling of 20838049 in words is "twenty million, eight hundred thirty-eight thousand, forty-nine".