21376353147 has 12 divisors (see below), whose sum is σ = 29199185064. Its totient is φ = 13902264480.

The previous prime is 21376353143. The next prime is 21376353209. The reversal of 21376353147 is 74135367312.

It is a happy number.

It is not a de Polignac number, because 21376353147 - 2² = 21376353143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21376353099 and 21376353108.

It is not an unprimeable number, because it can be changed into a prime (21376353143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1614918 + ... + 1628100.

It is an arithmetic number, because the mean of its divisors is an integer number (2433265422).

Almost surely, 2^21376353147 is an apocalyptic number.

21376353147 is a deficient number, since it is larger than the sum of its proper divisors (7822831917).

21376353147 is an frugal number, since it uses more digits than its factorization.

21376353147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26410 (or 13227 counting only the distinct ones).

The product of its digits is 317520, while the sum is 42.

The spelling of 21376353147 in words is "twenty-one billion, three hundred seventy-six million, three hundred fifty-three thousand, one hundred forty-seven".