20238469 has 2 divisors, whose sum is σ = 20238470. Its totient is φ = 20238468.

The previous prime is 20238437. The next prime is 20238473. The reversal of 20238469 is 96483202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15507844 + 4730625 = 3938^2 + 2175^2 .

It is a cyclic number.

It is not a de Polignac number, because 20238469 - 2⁵ = 20238437 is a prime.

It is a super-2 number, since 2×20238469² = 819191254927922, which contains 22 as substring.

It is equal to p_1284775 and since 20238469 and 1284775 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20238409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10119234 + 10119235.

It is an arithmetic number, because the mean of its divisors is an integer number (10119235).

Almost surely, 2^20238469 is an apocalyptic number.

It is an amenable number.

20238469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20238469 is an equidigital number, since it uses as much as digits as its factorization.

20238469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 20238469 is about 4498.7185953336. The cubic root of 20238469 is about 272.5163427620.

The spelling of 20238469 in words is "twenty million, two hundred thirty-eight thousand, four hundred sixty-nine".