20731327 has 2 divisors, whose sum is σ = 20731328. Its totient is φ = 20731326.

The previous prime is 20731309. The next prime is 20731339. The reversal of 20731327 is 72313702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20731327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20731307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10365663 + 10365664.

It is an arithmetic number, because the mean of its divisors is an integer number (10365664).

Almost surely, 2^20731327 is an apocalyptic number.

20731327 is a deficient number, since it is larger than the sum of its proper divisors (1).

20731327 is an equidigital number, since it uses as much as digits as its factorization.

20731327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 20731327 is about 4553.1667002208. The cubic root of 20731327 is about 274.7107791251.

The spelling of 20731327 in words is "twenty million, seven hundred thirty-one thousand, three hundred twenty-seven".