20453401 has 2 divisors, whose sum is σ = 20453402. Its totient is φ = 20453400.

The previous prime is 20453327. The next prime is 20453437. The reversal of 20453401 is 10435402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 203401 = 4500^2 + 451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20453401 is a prime.

It is a super-2 number, since 2×20453401² = 836683224933602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20453201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226700 + 10226701.

It is an arithmetic number, because the mean of its divisors is an integer number (10226701).

Almost surely, 2^20453401 is an apocalyptic number.

It is an amenable number.

20453401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20453401 is an equidigital number, since it uses as much as digits as its factorization.

20453401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20453401 is about 4522.5436426860. The cubic root of 20453401 is about 273.4776531467.

Adding to 20453401 its reverse (10435402), we get a palindrome (30888803).

The spelling of 20453401 in words is "twenty million, four hundred fifty-three thousand, four hundred one".