20454001 has 2 divisors, whose sum is σ = 20454002. Its totient is φ = 20454000.

The previous prime is 20453987. The next prime is 20454023. The reversal of 20454001 is 10045402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17631601 + 2822400 = 4199^2 + 1680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20454001 is a prime.

It is not a weakly prime, because it can be changed into another prime (20454041) 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, 10227000 + 10227001.

It is an arithmetic number, because the mean of its divisors is an integer number (10227001).

Almost surely, 2^20454001 is an apocalyptic number.

It is an amenable number.

20454001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20454001 is an equidigital number, since it uses as much as digits as its factorization.

20454001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20454001 is about 4522.6099765512. The cubic root of 20454001 is about 273.4803272738.

Adding to 20454001 its reverse (10045402), we get a palindrome (30499403).

The spelling of 20454001 in words is "twenty million, four hundred fifty-four thousand, one".