20444006420 has 24 divisors (see below), whose sum is σ = 43845871104. Its totient is φ = 8003610656.

The previous prime is 20444006419. The next prime is 20444006497. The reversal of 20444006420 is 2460044402.

It is a self number, because there is not a number n which added to its sum of digits gives 20444006420.

It is a congruent number.

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, 10873532 + ... + 10875411.

It is an arithmetic number, because the mean of its divisors is an integer number (1826911296).

Almost surely, 2^20444006420 is an apocalyptic number.

20444006420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20444006420 is an abundant number, since it is smaller than the sum of its proper divisors (23401864684).

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

20444006420 is a wasteful number, since it uses less digits than its factorization.

20444006420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21748999 (or 21748997 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The spelling of 20444006420 in words is "twenty billion, four hundred forty-four million, six thousand, four hundred twenty".