20738434829 has 4 divisors (see below), whose sum is σ = 23701068384. Its totient is φ = 17775801276.

The previous prime is 20738434823. The next prime is 20738434837. The reversal of 20738434829 is 92843483702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20738434829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20738434823) 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 in 3 ways as a sum of consecutive naturals, for example, 1481316767 + ... + 1481316780.

It is an arithmetic number, because the mean of its divisors is an integer number (5925267096).

Almost surely, 2^20738434829 is an apocalyptic number.

It is an amenable number.

20738434829 is a deficient number, since it is larger than the sum of its proper divisors (2962633555).

20738434829 is an equidigital number, since it uses as much as digits as its factorization.

20738434829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962633554.

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 20738434829 in words is "twenty billion, seven hundred thirty-eight million, four hundred thirty-four thousand, eight hundred twenty-nine".