20797854392 has 64 divisors (see below), whose sum is σ = 45530520000. Its totient is φ = 8902752768.

The previous prime is 20797854317. The next prime is 20797854403. The reversal of 20797854392 is 29345879702.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 2567084 + ... + 2575172.

It is an arithmetic number, because the mean of its divisors is an integer number (711414375).

Almost surely, 2^20797854392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20797854392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22765260000).

20797854392 is an abundant number, since it is smaller than the sum of its proper divisors (24732665608).

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

20797854392 is an equidigital number, since it uses as much as digits as its factorization.

20797854392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9053 (or 9035 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 20797854392 in words is "twenty billion, seven hundred ninety-seven million, eight hundred fifty-four thousand, three hundred ninety-two".