20044331987 has 2 divisors, whose sum is σ = 20044331988. Its totient is φ = 20044331986.

The previous prime is 20044331981. The next prime is 20044332013. The reversal of 20044331987 is 78913344002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20044331987 - 2²⁸ = 19775896531 is a prime.

It is not a weakly prime, because it can be changed into another prime (20044331981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10022165993 + 10022165994.

It is an arithmetic number, because the mean of its divisors is an integer number (10022165994).

Almost surely, 2^20044331987 is an apocalyptic number.

20044331987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20044331987 is an equidigital number, since it uses as much as digits as its factorization.

20044331987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

Adding to 20044331987 its reverse (78913344002), we get a palindrome (98957675989).

The spelling of 20044331987 in words is "twenty billion, forty-four million, three hundred thirty-one thousand, nine hundred eighty-seven".