21712072142443 has 4 divisors (see below), whose sum is σ = 21722966310088. Its totient is φ = 21701177974800.

The previous prime is 21712072142359. The next prime is 21712072142479. The reversal of 21712072142443 is 34424127021712.

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 21712072142443 - 2¹³ = 21712072134251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21712072142396 and 21712072142405.

It is not an unprimeable number, because it can be changed into a prime (21712072742443) 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, 5447080833 + ... + 5447084818.

It is an arithmetic number, because the mean of its divisors is an integer number (5430741577522).

Almost surely, 2^{21712072142443} is an apocalyptic number.

21712072142443 is a deficient number, since it is larger than the sum of its proper divisors (10894167645).

21712072142443 is a wasteful number, since it uses less digits than its factorization.

21712072142443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10894167644.

The product of its (nonzero) digits is 150528, while the sum is 40.

The spelling of 21712072142443 in words is "twenty-one trillion, seven hundred twelve billion, seventy-two million, one hundred forty-two thousand, four hundred forty-three".