20202772578 has 16 divisors (see below), whose sum is σ = 40713986016. Its totient is φ = 6682850720.

The previous prime is 20202772553. The next prime is 20202772609. The reversal of 20202772578 is 87527720202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12850851 + ... + 12852422.

It is an arithmetic number, because the mean of its divisors is an integer number (2544624126).

Almost surely, 2^20202772578 is an apocalyptic number.

20202772578 is an abundant number, since it is smaller than the sum of its proper divisors (20511213438).

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

20202772578 is a wasteful number, since it uses less digits than its factorization.

20202772578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25703409.

The product of its (nonzero) digits is 219520, while the sum is 42.

The spelling of 20202772578 in words is "twenty billion, two hundred two million, seven hundred seventy-two thousand, five hundred seventy-eight".