20429599 has 2 divisors, whose sum is σ = 20429600. Its totient is φ = 20429598.

The previous prime is 20429593. The next prime is 20429621. The reversal of 20429599 is 99592402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20429599 - 2⁷ = 20429471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20429593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10214799 + 10214800.

It is an arithmetic number, because the mean of its divisors is an integer number (10214800).

Almost surely, 2^20429599 is an apocalyptic number.

20429599 is a deficient number, since it is larger than the sum of its proper divisors (1).

20429599 is an equidigital number, since it uses as much as digits as its factorization.

20429599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 20429599 is about 4519.9113929368. The cubic root of 20429599 is about 273.3715283065.

The spelling of 20429599 in words is "twenty million, four hundred twenty-nine thousand, five hundred ninety-nine".