20573779242 has 16 divisors (see below), whose sum is σ = 41923928160. Its totient is φ = 6728531472.

The previous prime is 20573779231. The next prime is 20573779267. The reversal of 20573779242 is 24297737502.

It is a junction number, because it is equal to n+sod(n) for n = 20573779191 and 20573779200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32348392 + ... + 32349027.

It is an arithmetic number, because the mean of its divisors is an integer number (2620245510).

Almost surely, 2^20573779242 is an apocalyptic number.

20573779242 is an abundant number, since it is smaller than the sum of its proper divisors (21350148918).

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

20573779242 is a wasteful number, since it uses less digits than its factorization.

20573779242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64697477.

The product of its (nonzero) digits is 1481760, while the sum is 48.

The spelling of 20573779242 in words is "twenty billion, five hundred seventy-three million, seven hundred seventy-nine thousand, two hundred forty-two".