21076221808976 has 40 divisors (see below), whose sum is σ = 41786602417824. Its totient is φ = 10292603207040.

The previous prime is 21076221808927. The next prime is 21076221808979. The reversal of 21076221808976 is 67980812267012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21076221808979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15938810 + ... + 17210406.

Almost surely, 2^{21076221808976} is an apocalyptic number.

It is an amenable number.

21076221808976 is a deficient number, since it is larger than the sum of its proper divisors (20710380608848).

21076221808976 is a wasteful number, since it uses less digits than its factorization.

21076221808976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295739 (or 1295733 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 59.

The spelling of 21076221808976 in words is "twenty-one trillion, seventy-six billion, two hundred twenty-one million, eight hundred eight thousand, nine hundred seventy-six".