15453251240020 has 96 divisors (see below), whose sum is σ = 35539079103360. Its totient is φ = 5597645045760.

The previous prime is 15453251239969. The next prime is 15453251240029. The reversal of 15453251240020 is 2004215235451.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15453251240029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61126036 + ... + 61378324.

It is an arithmetic number, because the mean of its divisors is an integer number (370198740660).

Almost surely, 2^{15453251240020} is an apocalyptic number.

15453251240020 is a gapful number since it is divisible by the number (10) 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 15453251240020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17769539551680).

15453251240020 is an abundant number, since it is smaller than the sum of its proper divisors (20085827863340).

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

15453251240020 is a wasteful number, since it uses less digits than its factorization.

15453251240020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253385 (or 253383 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 15453251240020 its reverse (2004215235451), we get a palindrome (17457466475471).

The spelling of 15453251240020 in words is "fifteen trillion, four hundred fifty-three billion, two hundred fifty-one million, two hundred forty thousand, twenty".