20720922720 has 384 divisors, whose sum is σ = 70768857600. Its totient is φ = 5080154112.

The previous prime is 20720922683. The next prime is 20720922731. The reversal of 20720922720 is 2722902702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52193562 + ... + 52193958.

It is an arithmetic number, because the mean of its divisors is an integer number (184293900).

Almost surely, 2^20720922720 is an apocalyptic number.

20720922720 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 20720922720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35384428800).

20720922720 is an abundant number, since it is smaller than the sum of its proper divisors (50047934880).

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

20720922720 is a wasteful number, since it uses less digits than its factorization.

20720922720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The spelling of 20720922720 in words is "twenty billion, seven hundred twenty million, nine hundred twenty-two thousand, seven hundred twenty".