12047421672 has 96 divisors (see below), whose sum is σ = 38332738080. Its totient is φ = 3369905280.

The previous prime is 12047421641. The next prime is 12047421691. The reversal of 12047421672 is 27612474021.

12047421672 is a `hidden beast` number, since 1 + 20 + 474 + 2 + 167 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 574758 + ... + 595349.

It is an arithmetic number, because the mean of its divisors is an integer number (399299355).

Almost surely, 2^12047421672 is an apocalyptic number.

12047421672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12047421672 is an abundant number, since it is smaller than the sum of its proper divisors (26285316408).

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

12047421672 is a wasteful number, since it uses less digits than its factorization.

12047421672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170143 (or 1170136 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

Adding to 12047421672 its reverse (27612474021), we get a palindrome (39659895693).

The spelling of 12047421672 in words is "twelve billion, forty-seven million, four hundred twenty-one thousand, six hundred seventy-two".