20937467 has 2 divisors, whose sum is σ = 20937468. Its totient is φ = 20937466.

The previous prime is 20937463. The next prime is 20937481. The reversal of 20937467 is 76473902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20937467 - 2² = 20937463 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20937467.

It is not a weakly prime, because it can be changed into another prime (20937463) 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 as a sum of consecutive naturals, namely, 10468733 + 10468734.

It is an arithmetic number, because the mean of its divisors is an integer number (10468734).

Almost surely, 2^20937467 is an apocalyptic number.

20937467 is a deficient number, since it is larger than the sum of its proper divisors (1).

20937467 is an equidigital number, since it uses as much as digits as its factorization.

20937467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 20937467 is about 4575.7476984642. The cubic root of 20937467 is about 275.6182980598.

The spelling of 20937467 in words is "twenty million, nine hundred thirty-seven thousand, four hundred sixty-seven".