20986602 has 144 divisors (see below), whose sum is σ = 58796640. Its totient is φ = 4935168.

The previous prime is 20986601. The next prime is 20986613. The reversal of 20986602 is 20668902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20986601) 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 71 ways as a sum of consecutive naturals, for example, 1104549 + ... + 1104567.

It is an arithmetic number, because the mean of its divisors is an integer number (408310).

Almost surely, 2^20986602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20986602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29398320).

20986602 is an abundant number, since it is smaller than the sum of its proper divisors (37810038).

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

20986602 is a wasteful number, since it uses less digits than its factorization.

20986602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20986602 is about 4581.1136200710. The cubic root of 20986602 is about 275.8337320351.

The spelling of 20986602 in words is "twenty million, nine hundred eighty-six thousand, six hundred two".