21671702 has 16 divisors (see below), whose sum is σ = 37068192. Its totient is φ = 9413760.

The previous prime is 21671701. The next prime is 21671731. The reversal of 21671702 is 20717612.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21671701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24074 + ... + 24957.

It is an arithmetic number, because the mean of its divisors is an integer number (2316762).

Almost surely, 2^21671702 is an apocalyptic number.

21671702 is a deficient number, since it is larger than the sum of its proper divisors (15396490).

21671702 is a wasteful number, since it uses less digits than its factorization.

21671702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49063.

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

The square root of 21671702 is about 4655.2875313991. The cubic root of 21671702 is about 278.8031481839.

The spelling of 21671702 in words is "twenty-one million, six hundred seventy-one thousand, seven hundred two".