20253451 has 2 divisors, whose sum is σ = 20253452. Its totient is φ = 20253450.

The previous prime is 20253439. The next prime is 20253469. The reversal of 20253451 is 15435202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20253451 - 2⁵ = 20253419 is a prime.

It is not a weakly prime, because it can be changed into another prime (20257451) 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, 10126725 + 10126726.

It is an arithmetic number, because the mean of its divisors is an integer number (10126726).

Almost surely, 2^20253451 is an apocalyptic number.

20253451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20253451 is an equidigital number, since it uses as much as digits as its factorization.

20253451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20253451 is about 4500.3834281092. The cubic root of 20253451 is about 272.5835717075.

Adding to 20253451 its reverse (15435202), we get a palindrome (35688653).

It can be divided in two parts, 2025 and 3451, that added together give a square (5476 = 74²).

The spelling of 20253451 in words is "twenty million, two hundred fifty-three thousand, four hundred fifty-one".