20299929 has 16 divisors (see below), whose sum is σ = 29289792. Its totient is φ = 12431808.

The previous prime is 20299927. The next prime is 20299931. The reversal of 20299929 is 92999202.

It is an interprime number because it is at equal distance from previous prime (20299927) and next prime (20299931).

It is not a de Polignac number, because 20299929 - 2¹ = 20299927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20299927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7707 + ... + 9999.

It is an arithmetic number, because the mean of its divisors is an integer number (1830612).

Almost surely, 2^20299929 is an apocalyptic number.

It is an amenable number.

20299929 is a deficient number, since it is larger than the sum of its proper divisors (8989863).

20299929 is a wasteful number, since it uses less digits than its factorization.

20299929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 20299929 is about 4505.5442512531. The cubic root of 20299929 is about 272.7919223807.

The spelling of 20299929 in words is "twenty million, two hundred ninety-nine thousand, nine hundred twenty-nine".