20602888540 has 96 divisors (see below), whose sum is σ = 49380879744. Its totient is φ = 7153090560.

The previous prime is 20602888519. The next prime is 20602888541. The reversal of 20602888540 is 4588820602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20602888541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8913985 + ... + 8916295.

It is an arithmetic number, because the mean of its divisors is an integer number (514384164).

Almost surely, 2^20602888540 is an apocalyptic number.

20602888540 is a gapful number since it is divisible by the number (20) 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 20602888540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24690439872).

20602888540 is an abundant number, since it is smaller than the sum of its proper divisors (28777991204).

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

20602888540 is a wasteful number, since it uses less digits than its factorization.

20602888540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4367 (or 4365 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 43.

The spelling of 20602888540 in words is "twenty billion, six hundred two million, eight hundred eighty-eight thousand, five hundred forty".