20633354628 has 24 divisors (see below), whose sum is σ = 48172912032. Its totient is φ = 6873725184.

The previous prime is 20633354617. The next prime is 20633354641. The reversal of 20633354628 is 82645333602.

It is a self number, because there is not a number n which added to its sum of digits gives 20633354628.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 486250 + ... + 526977.

It is an arithmetic number, because the mean of its divisors is an integer number (2007204668).

Almost surely, 2^20633354628 is an apocalyptic number.

It is an amenable number.

20633354628 is an abundant number, since it is smaller than the sum of its proper divisors (27539557404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20633354628 is a wasteful number, since it uses less digits than its factorization.

20633354628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014931 (or 1014929 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 20633354628 in words is "twenty billion, six hundred thirty-three million, three hundred fifty-four thousand, six hundred twenty-eight".