21072630043 has 4 divisors (see below), whose sum is σ = 21072933288. Its totient is φ = 21072326800.

The previous prime is 21072629993. The next prime is 21072630071. The reversal of 21072630043 is 34003627012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21072630043 - 2¹³ = 21072621851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21072629993 and 21072630020.

It is not an unprimeable number, because it can be changed into a prime (21072630343) 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, 10143 + ... + 205543.

It is an arithmetic number, because the mean of its divisors is an integer number (5268233322).

Almost surely, 2^21072630043 is an apocalyptic number.

21072630043 is a deficient number, since it is larger than the sum of its proper divisors (303245).

21072630043 is a wasteful number, since it uses less digits than its factorization.

21072630043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303244.

The product of its (nonzero) digits is 6048, while the sum is 28.

The spelling of 21072630043 in words is "twenty-one billion, seventy-two million, six hundred thirty thousand, forty-three".