20454029 has 2 divisors, whose sum is σ = 20454030. Its totient is φ = 20454028.

The previous prime is 20454023. The next prime is 20454041. The reversal of 20454029 is 92045402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14645929 + 5808100 = 3827^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 20454029 - 2²⁰ = 19405453 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20453989 and 20454007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20454023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227014 + 10227015.

It is an arithmetic number, because the mean of its divisors is an integer number (10227015).

Almost surely, 2^20454029 is an apocalyptic number.

It is an amenable number.

20454029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20454029 is an equidigital number, since it uses as much as digits as its factorization.

20454029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20454029 is about 4522.6130721078. The cubic root of 20454029 is about 273.4804520652.

The spelling of 20454029 in words is "twenty million, four hundred fifty-four thousand, twenty-nine".