20478369600 has 504 divisors, whose sum is σ = 79048030880. Its totient is φ = 4998205440.

The previous prime is 20478369599. The next prime is 20478369601. The reversal of 20478369600 is 696387402.

20478369600 is a `hidden beast` number, since 2 + 0 + 4 + 7 + 8 + 36 + 9 + 600 = 666.

It is an interprime number because it is at equal distance from previous prime (20478369599) and next prime (20478369601).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20478369601) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 26020407 + ... + 26021193.

Almost surely, 2^20478369600 is an apocalyptic number.

20478369600 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 20478369600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39524015440).

20478369600 is an abundant number, since it is smaller than the sum of its proper divisors (58569661280).

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

20478369600 is a wasteful number, since it uses less digits than its factorization.

20478369600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 20478369600 in words is "twenty billion, four hundred seventy-eight million, three hundred sixty-nine thousand, six hundred".