20603713720 has 128 divisors (see below), whose sum is σ = 51322688640. Its totient is φ = 7404503040.

The previous prime is 20603713717. The next prime is 20603713729. The reversal of 20603713720 is 2731730602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20603713729) 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, 10337044 + ... + 10339036.

It is an arithmetic number, because the mean of its divisors is an integer number (400958505).

Almost surely, 2^20603713720 is an apocalyptic number.

20603713720 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 20603713720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25661344320).

20603713720 is an abundant number, since it is smaller than the sum of its proper divisors (30718974920).

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

20603713720 is a wasteful number, since it uses less digits than its factorization.

20603713720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705 (or 2701 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 31.

The spelling of 20603713720 in words is "twenty billion, six hundred three million, seven hundred thirteen thousand, seven hundred twenty".