20655393000 has 512 divisors, whose sum is σ = 73983836160. Its totient is φ = 4752000000.

The previous prime is 20655392983. The next prime is 20655393007. The reversal of 20655393000 is 39355602.

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

It is not an unprimeable number, because it can be changed into a prime (20655393007) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 62402835 + ... + 62403165.

It is an arithmetic number, because the mean of its divisors is an integer number (144499680).

Almost surely, 2^20655393000 is an apocalyptic number.

20655393000 is a gapful number since it is divisible by the number (20) 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 20655393000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36991918080).

20655393000 is an abundant number, since it is smaller than the sum of its proper divisors (53328443160).

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

20655393000 is a wasteful number, since it uses less digits than its factorization.

20655393000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 33.

The spelling of 20655393000 in words is "twenty billion, six hundred fifty-five million, three hundred ninety-three thousand".