21341875694 has 4 divisors (see below), whose sum is σ = 32012813544. Its totient is φ = 10670937846.

The previous prime is 21341875669. The next prime is 21341875699. The reversal of 21341875694 is 49657814312.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341875699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5335468922 + ... + 5335468925.

It is an arithmetic number, because the mean of its divisors is an integer number (8003203386).

Almost surely, 2^21341875694 is an apocalyptic number.

21341875694 is a deficient number, since it is larger than the sum of its proper divisors (10670937850).

21341875694 is a wasteful number, since it uses less digits than its factorization.

21341875694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10670937849.

The product of its digits is 1451520, while the sum is 50.

The spelling of 21341875694 in words is "twenty-one billion, three hundred forty-one million, eight hundred seventy-five thousand, six hundred ninety-four".