20546583378 has 32 divisors (see below), whose sum is σ = 41369227200. Its totient is φ = 6802937856.

The previous prime is 20546583361. The next prime is 20546583391. The reversal of 20546583378 is 87338564502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20546583378.

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, 987450 + ... + 1008042.

It is an arithmetic number, because the mean of its divisors is an integer number (1292788350).

Almost surely, 2^20546583378 is an apocalyptic number.

20546583378 is an abundant number, since it is smaller than the sum of its proper divisors (20822643822).

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

20546583378 is a wasteful number, since it uses less digits than its factorization.

20546583378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21706.

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 20546583378 in words is "twenty billion, five hundred forty-six million, five hundred eighty-three thousand, three hundred seventy-eight".