20153250 has 144 divisors (see below), whose sum is σ = 60122088. Its totient is φ = 4867200.

The previous prime is 20153227. The next prime is 20153251. The reversal of 20153250 is 5235102.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 4447881 + 15705369 = 2109^2 + 3963^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20153251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 380224 + ... + 380276.

Almost surely, 2^20153250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20153250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30061044).

20153250 is an abundant number, since it is smaller than the sum of its proper divisors (39968838).

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

20153250 is a wasteful number, since it uses less digits than its factorization.

20153250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20153250 is about 4489.2371289563. The cubic root of 20153250 is about 272.1333058362.

Adding to 20153250 its reverse (5235102), we get a palindrome (25388352).

The spelling of 20153250 in words is "twenty million, one hundred fifty-three thousand, two hundred fifty".