21424731616706 has 16 divisors (see below), whose sum is σ = 35069409341280. Its totient is φ = 9735526147680.

The previous prime is 21424731616697. The next prime is 21424731616753. The reversal of 21424731616706 is 60761613742412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149337851 + ... + 149481246.

It is an arithmetic number, because the mean of its divisors is an integer number (2191838083830).

Almost surely, 2^{21424731616706} is an apocalyptic number.

21424731616706 is a deficient number, since it is larger than the sum of its proper divisors (13644677724574).

21424731616706 is a wasteful number, since it uses less digits than its factorization.

21424731616706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298822369.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 21424731616706 in words is "twenty-one trillion, four hundred twenty-four billion, seven hundred thirty-one million, six hundred sixteen thousand, seven hundred six".