21614194694 has 4 divisors (see below), whose sum is σ = 32421292044. Its totient is φ = 10807097346.

The previous prime is 21614194669. The next prime is 21614194699. The reversal of 21614194694 is 49649141612.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21614194699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5403548672 + ... + 5403548675.

It is an arithmetic number, because the mean of its divisors is an integer number (8105323011).

Almost surely, 2^21614194694 is an apocalyptic number.

21614194694 is a deficient number, since it is larger than the sum of its proper divisors (10807097350).

21614194694 is a wasteful number, since it uses less digits than its factorization.

21614194694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10807097349.

The product of its digits is 373248, while the sum is 47.

The spelling of 21614194694 in words is "twenty-one billion, six hundred fourteen million, one hundred ninety-four thousand, six hundred ninety-four".