20495335770 has 256 divisors, whose sum is σ = 68124672000. Its totient is φ = 4269148416.

The previous prime is 20495335733. The next prime is 20495335781. The reversal of 20495335770 is 7753359402.

20495335770 is a `hidden beast` number, since 2 + 0 + 49 + 5 + 33 + 577 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1935751 + ... + 1946309.

It is an arithmetic number, because the mean of its divisors is an integer number (266112000).

Almost surely, 2^20495335770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20495335770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34062336000).

20495335770 is an abundant number, since it is smaller than the sum of its proper divisors (47629336230).

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

20495335770 is a wasteful number, since it uses less digits than its factorization.

20495335770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10674 (or 10668 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 45.

The spelling of 20495335770 in words is "twenty billion, four hundred ninety-five million, three hundred thirty-five thousand, seven hundred seventy".