21077417347 has 4 divisors (see below), whose sum is σ = 24088476976. Its totient is φ = 18066357720.

The previous prime is 21077417323. The next prime is 21077417357. The reversal of 21077417347 is 74371477012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21077417347 - 2⁷ = 21077417219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21077417357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1505529804 + ... + 1505529817.

It is an arithmetic number, because the mean of its divisors is an integer number (6022119244).

Almost surely, 2^21077417347 is an apocalyptic number.

21077417347 is a deficient number, since it is larger than the sum of its proper divisors (3011059629).

21077417347 is an equidigital number, since it uses as much as digits as its factorization.

21077417347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011059628.

The product of its (nonzero) digits is 230496, while the sum is 43.

The spelling of 21077417347 in words is "twenty-one billion, seventy-seven million, four hundred seventeen thousand, three hundred forty-seven".