20770288500 has 192 divisors, whose sum is σ = 66032418816. Its totient is φ = 5042304000.

The previous prime is 20770288499. The next prime is 20770288531. The reversal of 20770288500 is 588207702.

It is a super-4 number, since 4×20770288500⁴ (a number of 42 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1416205 + ... + 1430795.

It is an arithmetic number, because the mean of its divisors is an integer number (343918848).

Almost surely, 2^20770288500 is an apocalyptic number.

20770288500 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 20770288500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33016209408).

20770288500 is an abundant number, since it is smaller than the sum of its proper divisors (45262130316).

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

20770288500 is a wasteful number, since it uses less digits than its factorization.

20770288500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14699 (or 14687 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The spelling of 20770288500 in words is "twenty billion, seven hundred seventy million, two hundred eighty-eight thousand, five hundred".