20252759 has 4 divisors (see below), whose sum is σ = 20951160. Its totient is φ = 19554360.

The previous prime is 20252737. The next prime is 20252761. The reversal of 20252759 is 95725202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95725202 = 2 ⋅47862601.

It is a cyclic number.

It is not a de Polignac number, because 20252759 - 2⁸ = 20252503 is a prime.

It is a super-2 number, since 2×20252759² = 820348494224162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20252359) 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 in 3 ways as a sum of consecutive naturals, for example, 349157 + ... + 349214.

It is an arithmetic number, because the mean of its divisors is an integer number (5237790).

Almost surely, 2^20252759 is an apocalyptic number.

20252759 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20252759 is a deficient number, since it is larger than the sum of its proper divisors (698401).

20252759 is an equidigital number, since it uses as much as digits as its factorization.

20252759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698400.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 20252759 is about 4500.3065451145. The cubic root of 20252759 is about 272.5804672163.

The spelling of 20252759 in words is "twenty million, two hundred fifty-two thousand, seven hundred fifty-nine".