20629803 has 4 divisors (see below), whose sum is σ = 27506408. Its totient is φ = 13753200.

The previous prime is 20629799. The next prime is 20629853. The reversal of 20629803 is 30892602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20629803 - 2² = 20629799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20629853) 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 in 3 ways as a sum of consecutive naturals, for example, 3438298 + ... + 3438303.

It is an arithmetic number, because the mean of its divisors is an integer number (6876602).

Almost surely, 2^20629803 is an apocalyptic number.

20629803 is a deficient number, since it is larger than the sum of its proper divisors (6876605).

20629803 is an equidigital number, since it uses as much as digits as its factorization.

20629803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6876604.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20629803 is about 4542.0042932609. The cubic root of 20629803 is about 274.2616136671.

The spelling of 20629803 in words is "twenty million, six hundred twenty-nine thousand, eight hundred three".