21837056734 has 4 divisors (see below), whose sum is σ = 32755585104. Its totient is φ = 10918528366.

The previous prime is 21837056719. The next prime is 21837056743. The reversal of 21837056734 is 43765073812.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5459264182 + ... + 5459264185.

It is an arithmetic number, because the mean of its divisors is an integer number (8188896276).

Almost surely, 2^21837056734 is an apocalyptic number.

21837056734 is a deficient number, since it is larger than the sum of its proper divisors (10918528370).

21837056734 is a wasteful number, since it uses less digits than its factorization.

21837056734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10918528369.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 21837056734 in words is "twenty-one billion, eight hundred thirty-seven million, fifty-six thousand, seven hundred thirty-four".