15534421420 has 24 divisors (see below), whose sum is σ = 37282611744. Its totient is φ = 5326087296.

The previous prime is 15534421411. The next prime is 15534421447. The reversal of 15534421420 is 2412443551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55479937 + ... + 55480216.

It is an arithmetic number, because the mean of its divisors is an integer number (1553442156).

Almost surely, 2^15534421420 is an apocalyptic number.

15534421420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15534421420 is an abundant number, since it is smaller than the sum of its proper divisors (21748190324).

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

15534421420 is a wasteful number, since it uses less digits than its factorization.

15534421420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110960169 (or 110960167 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 15534421420 its reverse (2412443551), we get a palindrome (17946864971).

The spelling of 15534421420 in words is "fifteen billion, five hundred thirty-four million, four hundred twenty-one thousand, four hundred twenty".