20683698 has 32 divisors (see below), whose sum is σ = 47773824. Its totient is φ = 5847552.

The previous prime is 20683681. The next prime is 20683709. The reversal of 20683698 is 89638602.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1536 + ... + 6612.

It is an arithmetic number, because the mean of its divisors is an integer number (1492932).

Almost surely, 2^20683698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20683698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23886912).

20683698 is an abundant number, since it is smaller than the sum of its proper divisors (27090126).

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

20683698 is a wasteful number, since it uses less digits than its factorization.

20683698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5186.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 20683698 is about 4547.9333768207. The cubic root of 20683698 is about 274.5002405431.

The spelling of 20683698 in words is "twenty million, six hundred eighty-three thousand, six hundred ninety-eight".