20869907 has 2 divisors, whose sum is σ = 20869908. Its totient is φ = 20869906.

The previous prime is 20869889. The next prime is 20869949. The reversal of 20869907 is 70996802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20869907 - 2²⁴ = 4092691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20869957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10434953 + 10434954.

It is an arithmetic number, because the mean of its divisors is an integer number (10434954).

Almost surely, 2^20869907 is an apocalyptic number.

20869907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20869907 is an equidigital number, since it uses as much as digits as its factorization.

20869907 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 41.

The square root of 20869907 is about 4568.3593335026. The cubic root of 20869907 is about 275.3215280574.

The spelling of 20869907 in words is "twenty million, eight hundred sixty-nine thousand, nine hundred seven".