21346344277 has 4 divisors (see below), whose sum is σ = 21514425856. Its totient is φ = 21178262700.

The previous prime is 21346344211. The next prime is 21346344317. The reversal of 21346344277 is 77244364312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21346344277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21346344977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84040599 + ... + 84040852.

It is an arithmetic number, because the mean of its divisors is an integer number (5378606464).

Almost surely, 2^21346344277 is an apocalyptic number.

It is an amenable number.

21346344277 is a deficient number, since it is larger than the sum of its proper divisors (168081579).

21346344277 is a wasteful number, since it uses less digits than its factorization.

21346344277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168081578.

The product of its digits is 677376, while the sum is 43.

The spelling of 21346344277 in words is "twenty-one billion, three hundred forty-six million, three hundred forty-four thousand, two hundred seventy-seven".