20545527 has 4 divisors (see below), whose sum is σ = 27394040. Its totient is φ = 13697016.

The previous prime is 20545493. The next prime is 20545531. The reversal of 20545527 is 72554502.

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

It is not a de Polignac number, because 20545527 - 2¹² = 20541431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20545494 and 20545503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545597) 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, 3424252 + ... + 3424257.

It is an arithmetic number, because the mean of its divisors is an integer number (6848510).

Almost surely, 2^20545527 is an apocalyptic number.

20545527 is a deficient number, since it is larger than the sum of its proper divisors (6848513).

20545527 is an equidigital number, since it uses as much as digits as its factorization.

20545527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6848512.

The product of its (nonzero) digits is 14000, while the sum is 30.

The square root of 20545527 is about 4532.7173968824. The cubic root of 20545527 is about 273.8876366315.

The spelling of 20545527 in words is "twenty million, five hundred forty-five thousand, five hundred twenty-seven".