20352072 has 128 divisors (see below), whose sum is σ = 58988160. Its totient is φ = 5806080.

The previous prime is 20352061. The next prime is 20352083. The reversal of 20352072 is 27025302.

It is an interprime number because it is at equal distance from previous prime (20352061) and next prime (20352083).

It is a super-3 number, since 3×20352072³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473283 + ... + 473325.

It is an arithmetic number, because the mean of its divisors is an integer number (460845).

Almost surely, 2^20352072 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 20352072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29494080).

20352072 is an abundant number, since it is smaller than the sum of its proper divisors (38636088).

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

20352072 is a wasteful number, since it uses less digits than its factorization.

20352072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 20352072 is about 4511.3270774795. The cubic root of 20352072 is about 273.0252898253.

Adding to 20352072 its reverse (27025302), we get a palindrome (47377374).

The spelling of 20352072 in words is "twenty million, three hundred fifty-two thousand, seventy-two".