20703072 has 96 divisors (see below), whose sum is σ = 59820768. Its totient is φ = 6230016.

The previous prime is 20703031. The next prime is 20703079. The reversal of 20703072 is 27030702.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20703079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65988 + ... + 66300.

It is an arithmetic number, because the mean of its divisors is an integer number (623133).

Almost surely, 2^20703072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20703072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29910384).

20703072 is an abundant number, since it is smaller than the sum of its proper divisors (39117696).

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

20703072 is a wasteful number, since it uses less digits than its factorization.

20703072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 20703072 is about 4550.0628567087. The cubic root of 20703072 is about 274.5859200647.

Adding to 20703072 its reverse (27030702), we get a palindrome (47733774).

The spelling of 20703072 in words is "twenty million, seven hundred three thousand, seventy-two".