20052451 has 4 divisors (see below), whose sum is σ = 20079904. Its totient is φ = 20025000.

The previous prime is 20052437. The next prime is 20052457. The reversal of 20052451 is 15425002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15425002 = 2 ⋅7712501.

It is a cyclic number.

It is not a de Polignac number, because 20052451 - 2⁵ = 20052419 is a prime.

It is a super-2 number, since 2×20052451² = 804201582214802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20052457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12600 + ... + 14101.

It is an arithmetic number, because the mean of its divisors is an integer number (5019976).

Almost surely, 2^20052451 is an apocalyptic number.

20052451 is a deficient number, since it is larger than the sum of its proper divisors (27453).

20052451 is an equidigital number, since it uses as much as digits as its factorization.

20052451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27452.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20052451 is about 4477.9963153178. The cubic root of 20052451 is about 271.6788443904.

Adding to 20052451 its reverse (15425002), we get a palindrome (35477453).

It can be divided in two parts, 20052 and 451, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 20052451 in words is "twenty million, fifty-two thousand, four hundred fifty-one".