21438707614 has 4 divisors (see below), whose sum is σ = 32158061424. Its totient is φ = 10719353806.

The previous prime is 21438707581. The next prime is 21438707617. The reversal of 21438707614 is 41670783412.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21438707617) 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 as a sum of consecutive naturals, namely, 5359676902 + ... + 5359676905.

It is an arithmetic number, because the mean of its divisors is an integer number (8039515356).

Almost surely, 2^21438707614 is an apocalyptic number.

21438707614 is a deficient number, since it is larger than the sum of its proper divisors (10719353810).

21438707614 is a wasteful number, since it uses less digits than its factorization.

21438707614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10719353809.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 21438707614 in words is "twenty-one billion, four hundred thirty-eight million, seven hundred seven thousand, six hundred fourteen".