20929099 has 2 divisors, whose sum is σ = 20929100. Its totient is φ = 20929098.

The previous prime is 20929063. The next prime is 20929109. The reversal of 20929099 is 99092902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20929099 - 2²¹ = 18831947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20929019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10464549 + 10464550.

It is an arithmetic number, because the mean of its divisors is an integer number (10464550).

Almost surely, 2^20929099 is an apocalyptic number.

20929099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20929099 is an equidigital number, since it uses as much as digits as its factorization.

20929099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 20929099 is about 4574.8332210038. The cubic root of 20929099 is about 275.5815747184.

The spelling of 20929099 in words is "twenty million, nine hundred twenty-nine thousand, ninety-nine".