20734520832 has 320 divisors, whose sum is σ = 65830786560. Its totient is φ = 6420529152.

The previous prime is 20734520827. The next prime is 20734520869. The reversal of 20734520832 is 23802543702.

20734520832 is a `hidden beast` number, since 20 + 7 + 34 + 520 + 83 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19505133 + ... + 19506195.

It is an arithmetic number, because the mean of its divisors is an integer number (205721208).

Almost surely, 2^20734520832 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 20734520832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32915393280).

20734520832 is an abundant number, since it is smaller than the sum of its proper divisors (45096265728).

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

20734520832 is a wasteful number, since it uses less digits than its factorization.

20734520832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 20734520832 in words is "twenty billion, seven hundred thirty-four million, five hundred twenty thousand, eight hundred thirty-two".