20052761 has 4 divisors (see below), whose sum is σ = 20247552. Its totient is φ = 19857972.

The previous prime is 20052751. The next prime is 20052787. The reversal of 20052761 is 16725002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20052761 - 2²² = 15858457 is a prime.

It is a super-2 number, since 2×20052761² = 804226447446242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20052701) 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, 97241 + ... + 97446.

It is an arithmetic number, because the mean of its divisors is an integer number (5061888).

Almost surely, 2^20052761 is an apocalyptic number.

It is an amenable number.

20052761 is a deficient number, since it is larger than the sum of its proper divisors (194791).

20052761 is a wasteful number, since it uses less digits than its factorization.

20052761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194790.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20052761 is about 4478.0309288793. The cubic root of 20052761 is about 271.6802443856.

Adding to 20052761 its reverse (16725002), we get a palindrome (36777763).

The spelling of 20052761 in words is "twenty million, fifty-two thousand, seven hundred sixty-one".