20841492464 has 40 divisors (see below), whose sum is σ = 45775351440. Its totient is φ = 9112877568.

The previous prime is 20841492457. The next prime is 20841492509. The reversal of 20841492464 is 46429414802.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2632877 + ... + 2640780.

It is an arithmetic number, because the mean of its divisors is an integer number (1144383786).

Almost surely, 2^20841492464 is an apocalyptic number.

It is an amenable number.

20841492464 is an abundant number, since it is smaller than the sum of its proper divisors (24933858976).

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

20841492464 is a wasteful number, since it uses less digits than its factorization.

20841492464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5273697 (or 5273691 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 20841492464 in words is "twenty billion, eight hundred forty-one million, four hundred ninety-two thousand, four hundred sixty-four".