21470066073723 has 16 divisors (see below), whose sum is σ = 29463231326976. Its totient is φ = 13901156918880.

The previous prime is 21470066073683. The next prime is 21470066073809. The reversal of 21470066073723 is 32737066007412.

It is a happy number.

It is not a de Polignac number, because 21470066073723 - 2¹³ = 21470066065531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21470066075723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 752212836 + ... + 752241377.

It is an arithmetic number, because the mean of its divisors is an integer number (1841451957936).

Almost surely, 2^{21470066073723} is an apocalyptic number.

21470066073723 is a deficient number, since it is larger than the sum of its proper divisors (7993165253253).

21470066073723 is a wasteful number, since it uses less digits than its factorization.

21470066073723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504454354.

The product of its (nonzero) digits is 1778112, while the sum is 48.

The spelling of 21470066073723 in words is "twenty-one trillion, four hundred seventy billion, sixty-six million, seventy-three thousand, seven hundred twenty-three".