20660352 has 64 divisors (see below), whose sum is σ = 55373760. Its totient is φ = 6824960.

The previous prime is 20660347. The next prime is 20660377. The reversal of 20660352 is 25306602.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66277 + ... + 66587.

It is an arithmetic number, because the mean of its divisors is an integer number (865215).

Almost surely, 2^20660352 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 20660352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27686880).

20660352 is an abundant number, since it is smaller than the sum of its proper divisors (34713408).

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

20660352 is a wasteful number, since it uses less digits than its factorization.

20660352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20660352 is about 4545.3659918647. The cubic root of 20660352 is about 274.3969241496.

Adding to 20660352 its reverse (25306602), we get a palindrome (45966954).

It can be divided in two parts, 20660 and 352, that added together give a palindrome (21012).

The spelling of 20660352 in words is "twenty million, six hundred sixty thousand, three hundred fifty-two".