20087440563 has 32 divisors (see below), whose sum is σ = 28813188096. Its totient is φ = 12415379328.

The previous prime is 20087440559. The next prime is 20087440573. The reversal of 20087440563 is 36504478002.

It is a happy number.

It is not a de Polignac number, because 20087440563 - 2² = 20087440559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20087440573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 656481 + ... + 686397.

It is an arithmetic number, because the mean of its divisors is an integer number (900412128).

Almost surely, 2^20087440563 is an apocalyptic number.

20087440563 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20087440563 is a deficient number, since it is larger than the sum of its proper divisors (8725747533).

20087440563 is a wasteful number, since it uses less digits than its factorization.

20087440563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30243.

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 20087440563 in words is "twenty billion, eighty-seven million, four hundred forty thousand, five hundred sixty-three".