20940967 has 2 divisors, whose sum is σ = 20940968. Its totient is φ = 20940966.

The previous prime is 20940901. The next prime is 20940979. The reversal of 20940967 is 76904902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20940967 - 2⁷ = 20940839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20940067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10470483 + 10470484.

It is an arithmetic number, because the mean of its divisors is an integer number (10470484).

Almost surely, 2^20940967 is an apocalyptic number.

20940967 is a deficient number, since it is larger than the sum of its proper divisors (1).

20940967 is an equidigital number, since it uses as much as digits as its factorization.

20940967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 20940967 is about 4576.1301336391. The cubic root of 20940967 is about 275.6336550639.

The spelling of 20940967 in words is "twenty million, nine hundred forty thousand, nine hundred sixty-seven".