20440088628 has 12 divisors (see below), whose sum is σ = 47693540160. Its totient is φ = 6813362872.

The previous prime is 20440088593. The next prime is 20440088633. The reversal of 20440088628 is 82688004402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20440088628.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851670348 + ... + 851670371.

It is an arithmetic number, because the mean of its divisors is an integer number (3974461680).

Almost surely, 2^20440088628 is an apocalyptic number.

It is an amenable number.

20440088628 is an abundant number, since it is smaller than the sum of its proper divisors (27253451532).

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

20440088628 is a wasteful number, since it uses less digits than its factorization.

20440088628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703340726 (or 1703340724 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 42.

The spelling of 20440088628 in words is "twenty billion, four hundred forty million, eighty-eight thousand, six hundred twenty-eight".