20687027 has 2 divisors, whose sum is σ = 20687028. Its totient is φ = 20687026.

The previous prime is 20686969. The next prime is 20687039. The reversal of 20687027 is 72078602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20687027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20686984 and 20687002.

It is not a weakly prime, because it can be changed into another prime (20687047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10343513 + 10343514.

It is an arithmetic number, because the mean of its divisors is an integer number (10343514).

Almost surely, 2^20687027 is an apocalyptic number.

20687027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20687027 is an equidigital number, since it uses as much as digits as its factorization.

20687027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 20687027 is about 4548.2993525053. The cubic root of 20687027 is about 274.5149665088.

The spelling of 20687027 in words is "twenty million, six hundred eighty-seven thousand, twenty-seven".