20802620 has 24 divisors (see below), whose sum is σ = 44139984. Its totient is φ = 8234496.

The previous prime is 20802569. The next prime is 20802631. The reversal of 20802620 is 2620802.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20802592 and 20802601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3422 + ... + 7301.

It is an arithmetic number, because the mean of its divisors is an integer number (1839166).

Almost surely, 2^20802620 is an apocalyptic number.

20802620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20802620 is an abundant number, since it is smaller than the sum of its proper divisors (23337364).

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

20802620 is a wasteful number, since it uses less digits than its factorization.

20802620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10829 (or 10827 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20802620 is about 4560.9889278533. The cubic root of 20802620 is about 275.0253199827.

The spelling of 20802620 in words is "twenty million, eight hundred two thousand, six hundred twenty".