20372256 has 192 divisors, whose sum is σ = 67132800. Its totient is φ = 5971968.

The previous prime is 20372249. The next prime is 20372263. The reversal of 20372256 is 65227302.

It is an interprime number because it is at equal distance from previous prime (20372249) and next prime (20372263).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 279036 + ... + 279108.

It is an arithmetic number, because the mean of its divisors is an integer number (349650).

Almost surely, 2^20372256 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 20372256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33566400).

20372256 is an abundant number, since it is smaller than the sum of its proper divisors (46760544).

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

20372256 is a wasteful number, since it uses less digits than its factorization.

20372256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20372256 is about 4513.5635588745. The cubic root of 20372256 is about 273.1155168664.

Adding to 20372256 its reverse (65227302), we get a palindrome (85599558).

The spelling of 20372256 in words is "twenty million, three hundred seventy-two thousand, two hundred fifty-six".