20802082220 has 24 divisors (see below), whose sum is σ = 45190731600. Its totient is φ = 8033907392.

The previous prime is 20802082177. The next prime is 20802082237. The reversal of 20802082220 is 2228020802.

It is a self number, because there is not a number n which added to its sum of digits gives 20802082220.

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, 17932250 + ... + 17933409.

It is an arithmetic number, because the mean of its divisors is an integer number (1882947150).

Almost surely, 2^20802082220 is an apocalyptic number.

20802082220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20802082220 is an abundant number, since it is smaller than the sum of its proper divisors (24388649380).

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

20802082220 is a wasteful number, since it uses less digits than its factorization.

20802082220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35865697 (or 35865695 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The spelling of 20802082220 in words is "twenty billion, eight hundred two million, eighty-two thousand, two hundred twenty".