20151412240 has 80 divisors (see below), whose sum is σ = 47735962560. Its totient is φ = 7909009920.

The previous prime is 20151412201. The next prime is 20151412277. The reversal of 20151412240 is 4221415102.

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

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, 2691382 + ... + 2698858.

It is an arithmetic number, because the mean of its divisors is an integer number (596699532).

Almost surely, 2^20151412240 is an apocalyptic number.

20151412240 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 20151412240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23867981280).

20151412240 is an abundant number, since it is smaller than the sum of its proper divisors (27584550320).

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

20151412240 is a wasteful number, since it uses less digits than its factorization.

20151412240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8120 (or 8114 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 20151412240 its reverse (4221415102), we get a palindrome (24372827342).

The spelling of 20151412240 in words is "twenty billion, one hundred fifty-one million, four hundred twelve thousand, two hundred forty".