20078423040 has 352 divisors, whose sum is σ = 69651320256. Its totient is φ = 4907335680.

The previous prime is 20078423021. The next prime is 20078423041. The reversal of 20078423040 is 4032487002.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20078422989 and 20078423007.

It is not an unprimeable number, because it can be changed into a prime (20078423041) 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, 38537980 + ... + 38538500.

Almost surely, 2^20078423040 is an apocalyptic number.

20078423040 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 20078423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34825660128).

20078423040 is an abundant number, since it is smaller than the sum of its proper divisors (49572897216).

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

20078423040 is a wasteful number, since it uses less digits than its factorization.

20078423040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The spelling of 20078423040 in words is "twenty billion, seventy-eight million, four hundred twenty-three thousand, forty".