20150432240 has 80 divisors (see below), whose sum is σ = 47643751200. Its totient is φ = 7924055040.

The previous prime is 20150432201. The next prime is 20150432339. The reversal of 20150432240 is 4223405102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2896286 + ... + 2903234.

It is an arithmetic number, because the mean of its divisors is an integer number (595546890).

Almost surely, 2^20150432240 is an apocalyptic number.

20150432240 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 20150432240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23821875600).

20150432240 is an abundant number, since it is smaller than the sum of its proper divisors (27493318960).

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

20150432240 is a wasteful number, since it uses less digits than its factorization.

20150432240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7570 (or 7564 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20150432240 its reverse (4223405102), we get a palindrome (24373837342).

The spelling of 20150432240 in words is "twenty billion, one hundred fifty million, four hundred thirty-two thousand, two hundred forty".