20706932736 has 432 divisors, whose sum is σ = 70567890120. Its totient is φ = 5831884800.

The previous prime is 20706932717. The next prime is 20706932783. The reversal of 20706932736 is 63723960702.

It is a junction number, because it is equal to n+sod(n) for n = 20706932691 and 20706932700.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 91219855 + ... + 91220081.

Almost surely, 2^20706932736 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 20706932736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35283945060).

20706932736 is an abundant number, since it is smaller than the sum of its proper divisors (49860957384).

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

20706932736 is a wasteful number, since it uses less digits than its factorization.

20706932736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The spelling of 20706932736 in words is "twenty billion, seven hundred six million, nine hundred thirty-two thousand, seven hundred thirty-six".