20089863648 has 84 divisors (see below), whose sum is σ = 59300819928. Its totient is φ = 6696613440.

The previous prime is 20089863631. The next prime is 20089863649. The reversal of 20089863648 is 84636898002.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 20089863594 and 20089863603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20089863649) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 407268 + ... + 453923.

It is an arithmetic number, because the mean of its divisors is an integer number (705962142).

Almost surely, 2^20089863648 is an apocalyptic number.

It is an amenable number.

20089863648 is an abundant number, since it is smaller than the sum of its proper divisors (39210956280).

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

20089863648 is an frugal number, since it uses more digits than its factorization.

20089863648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861219 (or 861196 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 20089863648 in words is "twenty billion, eighty-nine million, eight hundred sixty-three thousand, six hundred forty-eight".