20802068 has 36 divisors (see below), whose sum is σ = 42632352. Its totient is φ = 8855280.

The previous prime is 20802049. The next prime is 20802073. The reversal of 20802068 is 86020802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41105 + ... + 41607.

It is an arithmetic number, because the mean of its divisors is an integer number (1184232).

Almost surely, 2^20802068 is an apocalyptic number.

20802068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20802068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21316176).

20802068 is an abundant number, since it is smaller than the sum of its proper divisors (21830284).

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

20802068 is a wasteful number, since it uses less digits than its factorization.

20802068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20802068 is about 4560.9284142595. The cubic root of 20802068 is about 275.0228873513.

The spelling of 20802068 in words is "twenty million, eight hundred two thousand, sixty-eight".