20938927 has 2 divisors, whose sum is σ = 20938928. Its totient is φ = 20938926.

The previous prime is 20938903. The next prime is 20938949. The reversal of 20938927 is 72983902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20938927 is a prime.

It is a super-2 number, since 2×20938927² = 876877327822658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20938927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20938997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10469463 + 10469464.

It is an arithmetic number, because the mean of its divisors is an integer number (10469464).

Almost surely, 2^20938927 is an apocalyptic number.

20938927 is a deficient number, since it is larger than the sum of its proper divisors (1).

20938927 is an equidigital number, since it uses as much as digits as its factorization.

20938927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 20938927 is about 4575.9072324513. The cubic root of 20938927 is about 275.6247043324.

The spelling of 20938927 in words is "twenty million, nine hundred thirty-eight thousand, nine hundred twenty-seven".