20495252736 has 324 divisors, whose sum is σ = 69065942400. Its totient is φ = 5828143104.

The previous prime is 20495252731. The next prime is 20495252753. The reversal of 20495252736 is 63725259402.

20495252736 is a `hidden beast` number, since 2 + 0 + 4 + 95 + 2 + 527 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20495252691 and 20495252700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20495252731) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42787345 + ... + 42787823.

Almost surely, 2^20495252736 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 20495252736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34532971200).

20495252736 is an abundant number, since it is smaller than the sum of its proper divisors (48570689664).

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

20495252736 is a wasteful number, since it uses less digits than its factorization.

20495252736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 20495252736 in words is "twenty billion, four hundred ninety-five million, two hundred fifty-two thousand, seven hundred thirty-six".