15540201422020 has 48 divisors (see below), whose sum is σ = 35797880454336. Its totient is φ = 5619761424000.

The previous prime is 15540201421999. The next prime is 15540201422023. The reversal of 15540201422020 is 2022410204551.

It is a happy number.

15540201422020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15540201422020.

It is not an unprimeable number, because it can be changed into a prime (15540201422023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195090786 + ... + 195170425.

It is an arithmetic number, because the mean of its divisors is an integer number (745789176132).

Almost surely, 2^{15540201422020} is an apocalyptic number.

15540201422020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15540201422020 is an abundant number, since it is smaller than the sum of its proper divisors (20257679032316).

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

15540201422020 is a wasteful number, since it uses less digits than its factorization.

15540201422020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390261412 (or 390261410 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 15540201422020 its reverse (2022410204551), we get a palindrome (17562611626571).

The spelling of 15540201422020 in words is "fifteen trillion, five hundred forty billion, two hundred one million, four hundred twenty-two thousand, twenty".