21023701706 has 32 divisors (see below), whose sum is σ = 37392233472. Its totient is φ = 8675210880.

The previous prime is 21023701679. The next prime is 21023701711. The reversal of 21023701706 is 60710732012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37451 + ... + 208446.

It is an arithmetic number, because the mean of its divisors is an integer number (1168507296).

Almost surely, 2^21023701706 is an apocalyptic number.

21023701706 is a deficient number, since it is larger than the sum of its proper divisors (16368531766).

21023701706 is a wasteful number, since it uses less digits than its factorization.

21023701706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246134.

The product of its (nonzero) digits is 3528, while the sum is 29.

The spelling of 21023701706 in words is "twenty-one billion, twenty-three million, seven hundred one thousand, seven hundred six".