20324791487 has 24 divisors (see below), whose sum is σ = 27776547792. Its totient is φ = 14619225600.

The previous prime is 20324791481. The next prime is 20324791523. The reversal of 20324791487 is 78419742302.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20324791487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20324791481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1443314 + ... + 1457327.

It is an arithmetic number, because the mean of its divisors is an integer number (1157356158).

Almost surely, 2^20324791487 is an apocalyptic number.

20324791487 is a deficient number, since it is larger than the sum of its proper divisors (7451756305).

20324791487 is a wasteful number, since it uses less digits than its factorization.

20324791487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900679 (or 2900672 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 20324791487 in words is "twenty billion, three hundred twenty-four million, seven hundred ninety-one thousand, four hundred eighty-seven".