20985702 has 8 divisors (see below), whose sum is σ = 41971416. Its totient is φ = 6995232.

The previous prime is 20985649. The next prime is 20985703. The reversal of 20985702 is 20758902.

It is a sphenic number, since it is the product of 3 distinct primes.

20985702 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20985703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748803 + ... + 1748814.

It is an arithmetic number, because the mean of its divisors is an integer number (5246427).

Almost surely, 2^20985702 is an apocalyptic number.

20985702 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20985702 is a wasteful number, since it uses less digits than its factorization.

20985702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497622.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 20985702 is about 4581.0153896271. The cubic root of 20985702 is about 275.8297889812.

The spelling of 20985702 in words is "twenty million, nine hundred eighty-five thousand, seven hundred two".