20468869 has 2 divisors, whose sum is σ = 20468870. Its totient is φ = 20468868.

The previous prime is 20468863. The next prime is 20468893. The reversal of 20468869 is 96886402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10640644 + 9828225 = 3262^2 + 3135^2 .

It is a cyclic number.

It is not a de Polignac number, because 20468869 - 2⁵ = 20468837 is a prime.

It is a super-2 number, since 2×20468869² = 837949196278322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20468863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10234434 + 10234435.

It is an arithmetic number, because the mean of its divisors is an integer number (10234435).

Almost surely, 2^20468869 is an apocalyptic number.

It is an amenable number.

20468869 is a deficient number, since it is larger than the sum of its proper divisors (1).

20468869 is an equidigital number, since it uses as much as digits as its factorization.

20468869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 20468869 is about 4524.2534190737. The cubic root of 20468869 is about 273.5465754484.

The spelling of 20468869 in words is "twenty million, four hundred sixty-eight thousand, eight hundred sixty-nine".