20527774321 has 4 divisors (see below), whose sum is σ = 21420286272. Its totient is φ = 19635262372.

The previous prime is 20527774301. The next prime is 20527774327. The reversal of 20527774321 is 12347772502.

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 20527774321 - 2⁹ = 20527773809 is a prime.

It is a super-2 number, since 2×20527774321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20527774327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446255941 + ... + 446255986.

It is an arithmetic number, because the mean of its divisors is an integer number (5355071568).

Almost surely, 2^20527774321 is an apocalyptic number.

It is an amenable number.

20527774321 is a deficient number, since it is larger than the sum of its proper divisors (892511951).

20527774321 is an equidigital number, since it uses as much as digits as its factorization.

20527774321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892511950.

The product of its (nonzero) digits is 164640, while the sum is 40.

The spelling of 20527774321 in words is "twenty billion, five hundred twenty-seven million, seven hundred seventy-four thousand, three hundred twenty-one".