20828161233 has 40 divisors (see below), whose sum is σ = 34170206400. Its totient is φ = 12538329120.

The previous prime is 20828161231. The next prime is 20828161271. The reversal of 20828161233 is 33216182802.

20828161233 is a `hidden beast` number, since 2 + 0 + 8 + 2 + 8 + 1 + 612 + 33 = 666.

It is not a de Polignac number, because 20828161233 - 2¹ = 20828161231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20828161231) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 54316 + ... + 211202.

It is an arithmetic number, because the mean of its divisors is an integer number (854255160).

Almost surely, 2^20828161233 is an apocalyptic number.

It is an amenable number.

20828161233 is a deficient number, since it is larger than the sum of its proper divisors (13342045167).

20828161233 is a wasteful number, since it uses less digits than its factorization.

20828161233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157059 (or 157050 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 20828161233 in words is "twenty billion, eight hundred twenty-eight million, one hundred sixty-one thousand, two hundred thirty-three".