20052791 has 4 divisors (see below), whose sum is σ = 21875784. Its totient is φ = 18229800.

The previous prime is 20052787. The next prime is 20052793. The reversal of 20052791 is 19725002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20052791 - 2² = 20052787 is a prime.

It is a super-2 number, since 2×20052791² = 804228853779362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20052791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20052793) 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, 911480 + ... + 911501.

It is an arithmetic number, because the mean of its divisors is an integer number (5468946).

Almost surely, 2^20052791 is an apocalyptic number.

20052791 is a deficient number, since it is larger than the sum of its proper divisors (1822993).

20052791 is a wasteful number, since it uses less digits than its factorization.

20052791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822992.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 20052791 is about 4478.0342785646. The cubic root of 20052791 is about 271.6803798682.

Adding to 20052791 its reverse (19725002), we get a palindrome (39777793).

It can be divided in two parts, 2005 and 2791, that multiplied together give a palindrome (5595955).

The spelling of 20052791 in words is "twenty million, fifty-two thousand, seven hundred ninety-one".