20828315955 has 16 divisors (see below), whose sum is σ = 33343997184. Its totient is φ = 11102204640.

The previous prime is 20828315923. The next prime is 20828315957. The reversal of 20828315955 is 55951382802.

It is a happy number.

It is not a de Polignac number, because 20828315955 - 2⁵ = 20828315923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20828315957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361711 + ... + 415320.

It is an arithmetic number, because the mean of its divisors is an integer number (2083999824).

Almost surely, 2^20828315955 is an apocalyptic number.

20828315955 is a deficient number, since it is larger than the sum of its proper divisors (12515681229).

20828315955 is a wasteful number, since it uses less digits than its factorization.

20828315955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778826.

The product of its (nonzero) digits is 864000, while the sum is 48.

The spelling of 20828315955 in words is "twenty billion, eight hundred twenty-eight million, three hundred fifteen thousand, nine hundred fifty-five".