20527331 has 16 divisors (see below), whose sum is σ = 23349600. Its totient is φ = 17875200.

The previous prime is 20527327. The next prime is 20527333. The reversal of 20527331 is 13372502.

It is a cyclic number.

It is not a de Polignac number, because 20527331 - 2² = 20527327 is a prime.

It is a super-2 number, since 2×20527331² = 842742635967122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20527297 and 20527306.

It is not an unprimeable number, because it can be changed into a prime (20527333) 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 15 ways as a sum of consecutive naturals, for example, 72911 + ... + 73191.

It is an arithmetic number, because the mean of its divisors is an integer number (1459350).

Almost surely, 2^20527331 is an apocalyptic number.

20527331 is a deficient number, since it is larger than the sum of its proper divisors (2822269).

20527331 is a wasteful number, since it uses less digits than its factorization.

20527331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20527331 is about 4530.7097677958. The cubic root of 20527331 is about 273.8067572036.

Adding to 20527331 its reverse (13372502), we get a palindrome (33899833).

The spelling of 20527331 in words is "twenty million, five hundred twenty-seven thousand, three hundred thirty-one".