21347238676 has 12 divisors (see below), whose sum is σ = 38981914272. Its totient is φ = 10209548888.

The previous prime is 21347238667. The next prime is 21347238709. The reversal of 21347238676 is 67683274312.

It is a super-3 number, since 3×21347238676³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116017510 + ... + 116017693.

It is an arithmetic number, because the mean of its divisors is an integer number (3248492856).

Almost surely, 2^21347238676 is an apocalyptic number.

It is an amenable number.

21347238676 is a deficient number, since it is larger than the sum of its proper divisors (17634675596).

21347238676 is a wasteful number, since it uses less digits than its factorization.

21347238676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232035230 (or 232035228 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 49.

The spelling of 21347238676 in words is "twenty-one billion, three hundred forty-seven million, two hundred thirty-eight thousand, six hundred seventy-six".