21127000670 has 16 divisors (see below), whose sum is σ = 38455890480. Its totient is φ = 8355847104.

The previous prime is 21127000651. The next prime is 21127000721. The reversal of 21127000670 is 7600072112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11868212 + ... + 11869991.

It is an arithmetic number, because the mean of its divisors is an integer number (2403493155).

Almost surely, 2^21127000670 is an apocalyptic number.

21127000670 is a deficient number, since it is larger than the sum of its proper divisors (17328889810).

21127000670 is a wasteful number, since it uses less digits than its factorization.

21127000670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23738299.

The product of its (nonzero) digits is 1176, while the sum is 26.

Adding to 21127000670 its reverse (7600072112), we get a palindrome (28727072782).

The spelling of 21127000670 in words is "twenty-one billion, one hundred twenty-seven million, six hundred seventy", and thus it is an aban number.