20802135552 has 160 divisors (see below), whose sum is σ = 60869318400. Its totient is φ = 6260613120.

The previous prime is 20802135533. The next prime is 20802135581. The reversal of 20802135552 is 25553120802.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2513373 + ... + 2521635.

It is an arithmetic number, because the mean of its divisors is an integer number (380433240).

Almost surely, 2^20802135552 is an apocalyptic number.

20802135552 is a gapful number since it is divisible by the number (22) 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 20802135552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30434659200).

20802135552 is an abundant number, since it is smaller than the sum of its proper divisors (40067182848).

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

20802135552 is a wasteful number, since it uses less digits than its factorization.

20802135552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8444 (or 8428 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 20802135552 in words is "twenty billion, eight hundred two million, one hundred thirty-five thousand, five hundred fifty-two".