13219471944 has 64 divisors (see below), whose sum is σ = 41966582400. Its totient is φ = 3776991552.

The previous prime is 13219471933. The next prime is 13219471957. The reversal of 13219471944 is 44917491231.

13219471944 is a `hidden beast` number, since 132 + 1 + 9 + 471 + 9 + 44 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 13219471944.

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, 4370007 + ... + 4373030.

It is an arithmetic number, because the mean of its divisors is an integer number (655727850).

Almost surely, 2^13219471944 is an apocalyptic number.

13219471944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13219471944 is an abundant number, since it is smaller than the sum of its proper divisors (28747110456).

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

13219471944 is a wasteful number, since it uses less digits than its factorization.

13219471944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8743059 (or 8743049 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 13219471944 in words is "thirteen billion, two hundred nineteen million, four hundred seventy-one thousand, nine hundred forty-four".