20216378904 has 64 divisors (see below), whose sum is σ = 51326922240. Its totient is φ = 6634790400.

The previous prime is 20216378891. The next prime is 20216378951. The reversal of 20216378904 is 40987361202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384829 + ... + 434195.

It is an arithmetic number, because the mean of its divisors is an integer number (801983160).

Almost surely, 2^20216378904 is an apocalyptic number.

20216378904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20216378904 is an abundant number, since it is smaller than the sum of its proper divisors (31110543336).

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

20216378904 is a wasteful number, since it uses less digits than its factorization.

20216378904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49640 (or 49636 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 20216378904 in words is "twenty billion, two hundred sixteen million, three hundred seventy-eight thousand, nine hundred four".