20931327 has 6 divisors (see below), whose sum is σ = 30234152. Its totient is φ = 13954212.

The previous prime is 20931289. The next prime is 20931347. The reversal of 20931327 is 72313902.

It is not a de Polignac number, because 20931327 - 2⁶ = 20931263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20931327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20931347) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1162843 + ... + 1162860.

Almost surely, 2^20931327 is an apocalyptic number.

20931327 is a deficient number, since it is larger than the sum of its proper divisors (9302825).

20931327 is a wasteful number, since it uses less digits than its factorization.

20931327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325709 (or 2325706 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20931327 is about 4575.0767206682. The cubic root of 20931327 is about 275.5913533519.

The spelling of 20931327 in words is "twenty million, nine hundred thirty-one thousand, three hundred twenty-seven".