20527813 has 8 divisors (see below), whose sum is σ = 21067200. Its totient is φ = 19991328.

The previous prime is 20527783. The next prime is 20527817. The reversal of 20527813 is 31872502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20527813 - 2¹⁷ = 20396741 is a prime.

It is a super-2 number, since 2×20527813² = 842782213125938, 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 (20527817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24048 + ... + 24886.

It is an arithmetic number, because the mean of its divisors is an integer number (2633400).

Almost surely, 2^20527813 is an apocalyptic number.

It is an amenable number.

20527813 is a deficient number, since it is larger than the sum of its proper divisors (539387).

20527813 is an equidigital number, since it uses as much as digits as its factorization.

20527813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 20527813 is about 4530.7629600322. The cubic root of 20527813 is about 273.8089002623.

The spelling of 20527813 in words is "twenty million, five hundred twenty-seven thousand, eight hundred thirteen".