20828234401 has 4 divisors (see below), whose sum is σ = 22430406292. Its totient is φ = 19226062512.

The previous prime is 20828234387. The next prime is 20828234411. The reversal of 20828234401 is 10443282802.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1611621025 + 19216613376 = 40145^2 + 138624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20828234401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20828234411) 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, 801085926 + ... + 801085951.

It is an arithmetic number, because the mean of its divisors is an integer number (5607601573).

Almost surely, 2^20828234401 is an apocalyptic number.

It is an amenable number.

20828234401 is a deficient number, since it is larger than the sum of its proper divisors (1602171891).

20828234401 is a wasteful number, since it uses less digits than its factorization.

20828234401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602171890.

The product of its (nonzero) digits is 24576, while the sum is 34.

The spelling of 20828234401 in words is "twenty billion, eight hundred twenty-eight million, two hundred thirty-four thousand, four hundred one".