20741506464 has 48 divisors (see below), whose sum is σ = 62224521408. Its totient is φ = 5926144512.

The previous prime is 20741506417. The next prime is 20741506481. The reversal of 20741506464 is 46460514702.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

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, 15431997 + ... + 15433340.

It is an arithmetic number, because the mean of its divisors is an integer number (1296344196).

Almost surely, 2^20741506464 is an apocalyptic number.

20741506464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20741506464 is an abundant number, since it is smaller than the sum of its proper divisors (41483014944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20741506464 is a wasteful number, since it uses less digits than its factorization.

20741506464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30865357 (or 30865349 counting only the distinct ones).

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

The spelling of 20741506464 in words is "twenty billion, seven hundred forty-one million, five hundred six thousand, four hundred sixty-four".