20386028544 has 352 divisors, whose sum is σ = 65424347136. Its totient is φ = 5520752640.

The previous prime is 20386028441. The next prime is 20386028581. The reversal of 20386028544 is 44582068302.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 20386028496 and 20386028505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35330784 + ... + 35331360.

Almost surely, 2^20386028544 is an apocalyptic number.

20386028544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20386028544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32712173568).

20386028544 is an abundant number, since it is smaller than the sum of its proper divisors (45038318592).

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

20386028544 is a wasteful number, since it uses less digits than its factorization.

20386028544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 20386028544 in words is "twenty billion, three hundred eighty-six million, twenty-eight thousand, five hundred forty-four".