20752929 has 24 divisors (see below), whose sum is σ = 31860192. Its totient is φ = 13491360.

The previous prime is 20752891. The next prime is 20752933. The reversal of 20752929 is 92925702.

It is a de Polignac number, because none of the positive numbers 2^k-20752929 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20752893 and 20752902.

It is not an unprimeable number, because it can be changed into a prime (20752939) 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 23 ways as a sum of consecutive naturals, for example, 8922 + ... + 11004.

It is an arithmetic number, because the mean of its divisors is an integer number (1327508).

Almost surely, 2^20752929 is an apocalyptic number.

It is an amenable number.

20752929 is a deficient number, since it is larger than the sum of its proper divisors (11107263).

20752929 is an equidigital number, since it uses as much as digits as its factorization.

20752929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 20752929 is about 4555.5382777450. The cubic root of 20752929 is about 274.8061620250.

The spelling of 20752929 in words is "twenty million, seven hundred fifty-two thousand, nine hundred twenty-nine".