20912967 has 24 divisors (see below), whose sum is σ = 30976400. Its totient is φ = 13592448.

The previous prime is 20912923. The next prime is 20912989. The reversal of 20912967 is 76921902.

It is not a de Polignac number, because 20912967 - 2¹¹ = 20910919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20912917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91209 + ... + 91437.

Almost surely, 2^20912967 is an apocalyptic number.

20912967 is a deficient number, since it is larger than the sum of its proper divisors (10063433).

20912967 is a wasteful number, since it uses less digits than its factorization.

20912967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 20912967 is about 4573.0697567389. The cubic root of 20912967 is about 275.5107510821.

The spelling of 20912967 in words is "twenty million, nine hundred twelve thousand, nine hundred sixty-seven".