20262800578 has 4 divisors (see below), whose sum is σ = 30394200870. Its totient is φ = 10131400288.

The previous prime is 20262800573. The next prime is 20262800611. The reversal of 20262800578 is 87500826202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20238761169 + 24039409 = 142263^2 + 4903^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20262800578.

It is not an unprimeable number, because it can be changed into a prime (20262800573) by changing a digit.

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 as a sum of consecutive naturals, namely, 5065700143 + ... + 5065700146.

Almost surely, 2^20262800578 is an apocalyptic number.

20262800578 is a deficient number, since it is larger than the sum of its proper divisors (10131400292).

20262800578 is a wasteful number, since it uses less digits than its factorization.

20262800578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10131400291.

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 20262800578 in words is "twenty billion, two hundred sixty-two million, eight hundred thousand, five hundred seventy-eight".