21741789463 has 4 divisors (see below), whose sum is σ = 21824458128. Its totient is φ = 21659120800.

The previous prime is 21741789451. The next prime is 21741789497. The reversal of 21741789463 is 36498714712.

It is a happy number.

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 21741789463 - 2⁵ = 21741789431 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 21741789463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21741289463) 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, 41333938 + ... + 41334463.

It is an arithmetic number, because the mean of its divisors is an integer number (5456114532).

Almost surely, 2^21741789463 is an apocalyptic number.

21741789463 is a deficient number, since it is larger than the sum of its proper divisors (82668665).

21741789463 is an equidigital number, since it uses as much as digits as its factorization.

21741789463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82668664.

The product of its digits is 2032128, while the sum is 52.

The spelling of 21741789463 in words is "twenty-one billion, seven hundred forty-one million, seven hundred eighty-nine thousand, four hundred sixty-three".