20228689815 has 16 divisors (see below), whose sum is σ = 34069372800. Its totient is φ = 10220811552.

The previous prime is 20228689813. The next prime is 20228689823. The reversal of 20228689815 is 51898682202.

It is not a de Polignac number, because 20228689815 - 2¹ = 20228689813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228689813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35488645 + ... + 35489214.

It is an arithmetic number, because the mean of its divisors is an integer number (2129335800).

Almost surely, 2^20228689815 is an apocalyptic number.

20228689815 is a deficient number, since it is larger than the sum of its proper divisors (13840682985).

20228689815 is a wasteful number, since it uses less digits than its factorization.

20228689815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70977886.

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 20228689815 in words is "twenty billion, two hundred twenty-eight million, six hundred eighty-nine thousand, eight hundred fifteen".