20623152 has 80 divisors (see below), whose sum is σ = 58746240. Its totient is φ = 6182400.

The previous prime is 20623139. The next prime is 20623181. The reversal of 20623152 is 25132602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73252 + ... + 73532.

It is an arithmetic number, because the mean of its divisors is an integer number (734328).

Almost surely, 2^20623152 is an apocalyptic number.

20623152 is a gapful number since it is divisible by the number (22) 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 20623152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29373120).

20623152 is an abundant number, since it is smaller than the sum of its proper divisors (38123088).

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

20623152 is a wasteful number, since it uses less digits than its factorization.

20623152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20623152 is about 4541.2720684848. The cubic root of 20623152 is about 274.2321367325.

Adding to 20623152 its reverse (25132602), we get a palindrome (45755754).

The spelling of 20623152 in words is "twenty million, six hundred twenty-three thousand, one hundred fifty-two".