20355291792 has 160 divisors (see below), whose sum is σ = 64267374720. Its totient is φ = 6168096000.

The previous prime is 20355291791. The next prime is 20355291799. The reversal of 20355291792 is 29719255302.

20355291792 is a `hidden beast` number, since 2 + 0 + 3 + 552 + 9 + 1 + 7 + 92 = 666.

It is not an unprimeable number, because it can be changed into a prime (20355291791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 557292 + ... + 592692.

It is an arithmetic number, because the mean of its divisors is an integer number (401671092).

Almost surely, 2^20355291792 is an apocalyptic number.

20355291792 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 20355291792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32133687360).

20355291792 is an abundant number, since it is smaller than the sum of its proper divisors (43912082928).

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

20355291792 is a wasteful number, since it uses less digits than its factorization.

20355291792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35451 (or 35417 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 20355291792 in words is "twenty billion, three hundred fifty-five million, two hundred ninety-one thousand, seven hundred ninety-two".