20601064536 has 128 divisors (see below), whose sum is σ = 57530692800. Its totient is φ = 6106060800.

The previous prime is 20601064513. The next prime is 20601064553. The reversal of 20601064536 is 63546010602.

It is a junction number, because it is equal to n+sod(n) for n = 20601064497 and 20601064506.

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, 1157110 + ... + 1174778.

Almost surely, 2^20601064536 is an apocalyptic number.

20601064536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20601064536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28765346400).

20601064536 is an abundant number, since it is smaller than the sum of its proper divisors (36929628264).

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

20601064536 is a wasteful number, since it uses less digits than its factorization.

20601064536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17829 (or 17825 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 20601064536 in words is "twenty billion, six hundred one million, sixty-four thousand, five hundred thirty-six".