21770534347 has 8 divisors (see below), whose sum is σ = 22309524144. Its totient is φ = 21236293728.

The previous prime is 21770534341. The next prime is 21770534351. The reversal of 21770534347 is 74343507712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21770534347 - 2²³ = 21762145739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21770534341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178013 + ... + 1196350.

It is an arithmetic number, because the mean of its divisors is an integer number (2788690518).

Almost surely, 2^21770534347 is an apocalyptic number.

21770534347 is a deficient number, since it is larger than the sum of its proper divisors (538989797).

21770534347 is a wasteful number, since it uses less digits than its factorization.

21770534347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374589.

The product of its (nonzero) digits is 493920, while the sum is 43.

The spelling of 21770534347 in words is "twenty-one billion, seven hundred seventy million, five hundred thirty-four thousand, three hundred forty-seven".