20702989120 has 112 divisors (see below), whose sum is σ = 54275126400. Its totient is φ = 7459153920.

The previous prime is 20702989093. The next prime is 20702989123. The reversal of 20702989120 is 2198920702.

It is a super-2 number, since 2×20702989120² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20702989123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356701 + ... + 410659.

Almost surely, 2^20702989120 is an apocalyptic number.

20702989120 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 20702989120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27137563200).

20702989120 is an abundant number, since it is smaller than the sum of its proper divisors (33572137280).

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

20702989120 is a wasteful number, since it uses less digits than its factorization.

20702989120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54096 (or 54086 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 20702989120 in words is "twenty billion, seven hundred two million, nine hundred eighty-nine thousand, one hundred twenty".