20132541664 has 48 divisors (see below), whose sum is σ = 41896915200. Its totient is φ = 9496497024.

The previous prime is 20132541659. The next prime is 20132541679. The reversal of 20132541664 is 46614523102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76039 + ... + 214585.

It is an arithmetic number, because the mean of its divisors is an integer number (872852400).

Almost surely, 2^20132541664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20132541664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20948457600).

20132541664 is an abundant number, since it is smaller than the sum of its proper divisors (21764373536).

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

20132541664 is a wasteful number, since it uses less digits than its factorization.

20132541664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138815 (or 138807 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 20132541664 in words is "twenty billion, one hundred thirty-two million, five hundred forty-one thousand, six hundred sixty-four".