20652078356 has 144 divisors (see below), whose sum is σ = 47065721472. Its totient is φ = 7717006080.

The previous prime is 20652078197. The next prime is 20652078361. The reversal of 20652078356 is 65387025602.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15040886 + ... + 15042258.

It is an arithmetic number, because the mean of its divisors is an integer number (326845288).

Almost surely, 2^20652078356 is an apocalyptic number.

20652078356 is a gapful number since it is divisible by the number (26) 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 20652078356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23532860736).

20652078356 is an abundant number, since it is smaller than the sum of its proper divisors (26413643116).

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

20652078356 is a wasteful number, since it uses less digits than its factorization.

20652078356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 20652078356 in words is "twenty billion, six hundred fifty-two million, seventy-eight thousand, three hundred fifty-six".