20363978478 has 32 divisors (see below), whose sum is σ = 40827261600. Its totient is φ = 6771465216.

The previous prime is 20363978471. The next prime is 20363978491. The reversal of 20363978478 is 87487936302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20363978471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5234358 + ... + 5238246.

It is an arithmetic number, because the mean of its divisors is an integer number (1275851925).

Almost surely, 2^20363978478 is an apocalyptic number.

20363978478 is an abundant number, since it is smaller than the sum of its proper divisors (20463283122).

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

20363978478 is a wasteful number, since it uses less digits than its factorization.

20363978478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5796.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The spelling of 20363978478 in words is "twenty billion, three hundred sixty-three million, nine hundred seventy-eight thousand, four hundred seventy-eight".