15520204214432 has 144 divisors (see below), whose sum is σ = 32414005068480. Its totient is φ = 7299938663424.

The previous prime is 15520204214329. The next prime is 15520204214477. The reversal of 15520204214432 is 23441240202551.

It is a junction number, because it is equal to n+sod(n) for n = 15520204214392 and 15520204214401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12327405419 + ... + 12327406677.

It is an arithmetic number, because the mean of its divisors is an integer number (225097257420).

Almost surely, 2^{15520204214432} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15520204214432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16207002534240).

15520204214432 is an abundant number, since it is smaller than the sum of its proper divisors (16893800854048).

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

15520204214432 is an equidigital number, since it uses as much as digits as its factorization.

15520204214432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323 (or 1836 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 15520204214432 its reverse (23441240202551), we get a palindrome (38961444416983).

The spelling of 15520204214432 in words is "fifteen trillion, five hundred twenty billion, two hundred four million, two hundred fourteen thousand, four hundred thirty-two".