20243561583 has 16 divisors (see below), whose sum is σ = 30925045760. Its totient is φ = 11538606816.

The previous prime is 20243561581. The next prime is 20243561587. The reversal of 20243561583 is 38516534202.

It is a happy number.

It is not a de Polignac number, because 20243561583 - 2¹ = 20243561581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243561581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1205743 + ... + 1222416.

It is an arithmetic number, because the mean of its divisors is an integer number (1932815360).

Almost surely, 2^20243561583 is an apocalyptic number.

20243561583 is a deficient number, since it is larger than the sum of its proper divisors (10681484177).

20243561583 is a wasteful number, since it uses less digits than its factorization.

20243561583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428566.

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 20243561583 in words is "twenty billion, two hundred forty-three million, five hundred sixty-one thousand, five hundred eighty-three".