20450097987 has 16 divisors (see below), whose sum is σ = 30549533952. Its totient is φ = 12059025120.

The previous prime is 20450097959. The next prime is 20450097991. The reversal of 20450097987 is 78979005402.

It is not a de Polignac number, because 20450097987 - 2⁶ = 20450097923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20450097907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8373103 + ... + 8375544.

It is an arithmetic number, because the mean of its divisors is an integer number (1909345872).

Almost surely, 2^20450097987 is an apocalyptic number.

20450097987 is a deficient number, since it is larger than the sum of its proper divisors (10099435965).

20450097987 is a wasteful number, since it uses less digits than its factorization.

20450097987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16748698.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 20450097987 in words is "twenty billion, four hundred fifty million, ninety-seven thousand, nine hundred eighty-seven".