15550013420 has 48 divisors (see below), whose sum is σ = 34905947328. Its totient is φ = 5804451840.

The previous prime is 15550013399. The next prime is 15550013491. The reversal of 15550013420 is 2431005551.

It is a self number, because there is not a number n which added to its sum of digits gives 15550013420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393389 + ... + 431108.

It is an arithmetic number, because the mean of its divisors is an integer number (727207236).

Almost surely, 2^15550013420 is an apocalyptic number.

15550013420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15550013420 is an abundant number, since it is smaller than the sum of its proper divisors (19355933908).

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

15550013420 is a wasteful number, since it uses less digits than its factorization.

15550013420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824570 (or 824568 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 15550013420 its reverse (2431005551), we get a palindrome (17981018971).

The spelling of 15550013420 in words is "fifteen billion, five hundred fifty million, thirteen thousand, four hundred twenty".