20150240 has 72 divisors (see below), whose sum is σ = 52422552. Its totient is φ = 7258880.

The previous prime is 20150233. The next prime is 20150257. The reversal of 20150240 is 4205102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188267 + ... + 188373.

It is an arithmetic number, because the mean of its divisors is an integer number (728091).

Almost surely, 2^20150240 is an apocalyptic number.

20150240 is a gapful number since it is divisible by the number (20) 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 20150240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26211276).

20150240 is an abundant number, since it is smaller than the sum of its proper divisors (32272312).

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

20150240 is a wasteful number, since it uses less digits than its factorization.

20150240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20150240 is about 4488.9018701682. The cubic root of 20150240 is about 272.1197569539.

Adding to 20150240 its reverse (4205102), we get a palindrome (24355342).

The spelling of 20150240 in words is "twenty million, one hundred fifty thousand, two hundred forty".