20239699 has 2 divisors, whose sum is σ = 20239700. Its totient is φ = 20239698.

The previous prime is 20239679. The next prime is 20239727. The reversal of 20239699 is 99693202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20239699 - 2¹³ = 20231507 is a prime.

It is a super-2 number, since 2×20239699² = 819290831221202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20239619) 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, 10119849 + 10119850.

It is an arithmetic number, because the mean of its divisors is an integer number (10119850).

Almost surely, 2^20239699 is an apocalyptic number.

20239699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20239699 is an equidigital number, since it uses as much as digits as its factorization.

20239699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 20239699 is about 4498.8552988510. The cubic root of 20239699 is about 272.5218634087.

The spelling of 20239699 in words is "twenty million, two hundred thirty-nine thousand, six hundred ninety-nine".