20419647444 has 72 divisors (see below), whose sum is σ = 62460111168. Its totient is φ = 5490996480.

The previous prime is 20419647433. The next prime is 20419647481. The reversal of 20419647444 is 44474691402.

It is a self number, because there is not a number n which added to its sum of digits gives 20419647444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2378962 + ... + 2387529.

It is an arithmetic number, because the mean of its divisors is an integer number (867501544).

Almost surely, 2^20419647444 is an apocalyptic number.

It is an amenable number.

20419647444 is an abundant number, since it is smaller than the sum of its proper divisors (42040463724).

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

20419647444 is a wasteful number, since it uses less digits than its factorization.

20419647444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4766525 (or 4766520 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 20419647444 in words is "twenty billion, four hundred nineteen million, six hundred forty-seven thousand, four hundred forty-four".