20629867 has 2 divisors, whose sum is σ = 20629868. Its totient is φ = 20629866.

The previous prime is 20629859. The next prime is 20629883. The reversal of 20629867 is 76892602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20629867 - 2³ = 20629859 is a prime.

It is not a weakly prime, because it can be changed into another prime (20629067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10314933 + 10314934.

It is an arithmetic number, because the mean of its divisors is an integer number (10314934).

Almost surely, 2^20629867 is an apocalyptic number.

20629867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20629867 is an equidigital number, since it uses as much as digits as its factorization.

20629867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 20629867 is about 4542.0113386032. The cubic root of 20629867 is about 274.2618972814.

The spelling of 20629867 in words is "twenty million, six hundred twenty-nine thousand, eight hundred sixty-seven".