13220479500 has 48 divisors (see below), whose sum is σ = 38498040672. Its totient is φ = 3525460800.

The previous prime is 13220479499. The next prime is 13220479549. The reversal of 13220479500 is 597402231.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4405327 + ... + 4408326.

It is an arithmetic number, because the mean of its divisors is an integer number (802042514).

Almost surely, 2^13220479500 is an apocalyptic number.

13220479500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13220479500 is an abundant number, since it is smaller than the sum of its proper divisors (25277561172).

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

13220479500 is a wasteful number, since it uses less digits than its factorization.

13220479500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8813675 (or 8813663 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 13220479500 in words is "thirteen billion, two hundred twenty million, four hundred seventy-nine thousand, five hundred".