20945527 has 8 divisors (see below), whose sum is σ = 21330000. Its totient is φ = 20564544.

The previous prime is 20945521. The next prime is 20945537. The reversal of 20945527 is 72554902.

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 20945527 - 2⁷ = 20945399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20945492 and 20945501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20945521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13224 + ... + 14722.

It is an arithmetic number, because the mean of its divisors is an integer number (2666250).

Almost surely, 2^20945527 is an apocalyptic number.

20945527 is a deficient number, since it is larger than the sum of its proper divisors (384473).

20945527 is a wasteful number, since it uses less digits than its factorization.

20945527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 20945527 is about 4576.6283440979. The cubic root of 20945527 is about 275.6536604795.

The spelling of 20945527 in words is "twenty million, nine hundred forty-five thousand, five hundred twenty-seven".