20029091 has 2 divisors, whose sum is σ = 20029092. Its totient is φ = 20029090.

The previous prime is 20029081. The next prime is 20029103. The reversal of 20029091 is 19092002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20029091 is a prime.

It is not a weakly prime, because it can be changed into another prime (20029081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10014545 + 10014546.

It is an arithmetic number, because the mean of its divisors is an integer number (10014546).

Almost surely, 2^20029091 is an apocalyptic number.

20029091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20029091 is an equidigital number, since it uses as much as digits as its factorization.

20029091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 20029091 is about 4475.3872458146. The cubic root of 20029091 is about 271.5733064387.

The spelling of 20029091 in words is "twenty million, twenty-nine thousand, ninety-one".