15543142402420 has 48 divisors (see below), whose sum is σ = 34586837429760. Its totient is φ = 5847099451904.

The previous prime is 15543142402373. The next prime is 15543142402423. The reversal of 15543142402420 is 2420424134551.

It is a self number, because there is not a number n which added to its sum of digits gives 15543142402420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15543142402423) 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, 16881004 + ... + 17777923.

It is an arithmetic number, because the mean of its divisors is an integer number (720559113120).

Almost surely, 2^{15543142402420} is an apocalyptic number.

15543142402420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15543142402420 is an abundant number, since it is smaller than the sum of its proper divisors (19043695027340).

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

15543142402420 is a wasteful number, since it uses less digits than its factorization.

15543142402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34660272 (or 34660270 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 15543142402420 its reverse (2420424134551), we get a palindrome (17963566536971).

The spelling of 15543142402420 in words is "fifteen trillion, five hundred forty-three billion, one hundred forty-two million, four hundred two thousand, four hundred twenty".