21470654743 has 4 divisors (see below), whose sum is σ = 21471399360. Its totient is φ = 21469910128.

The previous prime is 21470654719. The next prime is 21470654771. The reversal of 21470654743 is 34745607412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21470654743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21470654743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470654783) 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, 327238 + ... + 387331.

It is an arithmetic number, because the mean of its divisors is an integer number (5367849840).

Almost surely, 2^21470654743 is an apocalyptic number.

21470654743 is a deficient number, since it is larger than the sum of its proper divisors (744617).

21470654743 is an equidigital number, since it uses as much as digits as its factorization.

21470654743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744616.

The product of its (nonzero) digits is 564480, while the sum is 43.

The spelling of 21470654743 in words is "twenty-one billion, four hundred seventy million, six hundred fifty-four thousand, seven hundred forty-three".