20748241064 has 32 divisors (see below), whose sum is σ = 40435809120. Its totient is φ = 9972115776.

The previous prime is 20748241043. The next prime is 20748241067. The reversal of 20748241064 is 46014284702.

It is not an unprimeable number, because it can be changed into a prime (20748241067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397694 + ... + 446829.

It is an arithmetic number, because the mean of its divisors is an integer number (1263619035).

Almost surely, 2^20748241064 is an apocalyptic number.

It is an amenable number.

20748241064 is a deficient number, since it is larger than the sum of its proper divisors (19687568056).

20748241064 is a wasteful number, since it uses less digits than its factorization.

20748241064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844649 (or 844645 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The spelling of 20748241064 in words is "twenty billion, seven hundred forty-eight million, two hundred forty-one thousand, sixty-four".