20453453 has 2 divisors, whose sum is σ = 20453454. Its totient is φ = 20453452.

The previous prime is 20453437. The next prime is 20453473. The reversal of 20453453 is 35435402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18088009 + 2365444 = 4253^2 + 1538^2 .

It is a cyclic number.

It is not a de Polignac number, because 20453453 - 2⁴ = 20453437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20453473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226726 + 10226727.

It is an arithmetic number, because the mean of its divisors is an integer number (10226727).

Almost surely, 2^20453453 is an apocalyptic number.

It is an amenable number.

20453453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20453453 is an equidigital number, since it uses as much as digits as its factorization.

20453453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 20453453 is about 4522.5493916595. The cubic root of 20453453 is about 273.4778849064.

Adding to 20453453 its reverse (35435402), we get a palindrome (55888855).

The spelling of 20453453 in words is "twenty million, four hundred fifty-three thousand, four hundred fifty-three".