20709702 has 32 divisors (see below), whose sum is σ = 49563360. Its totient is φ = 6372000.

The previous prime is 20709701. The next prime is 20709719. The reversal of 20709702 is 20790702.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20709701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14049 + ... + 15452.

It is an arithmetic number, because the mean of its divisors is an integer number (1548855).

Almost surely, 2^20709702 is an apocalyptic number.

20709702 is an abundant number, since it is smaller than the sum of its proper divisors (28853658).

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

20709702 is a wasteful number, since it uses less digits than its factorization.

20709702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29525 (or 29519 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 20709702 is about 4550.7913597527. The cubic root of 20709702 is about 274.6152282813.

The spelling of 20709702 in words is "twenty million, seven hundred nine thousand, seven hundred two".