20695026950640 has 480 divisors, whose sum is σ = 81811573009920. Its totient is φ = 4589168265216.

The previous prime is 20695026950639. The next prime is 20695026950683. The reversal of 20695026950640 is 4605962059602.

20695026950640 is a `hidden beast` number, since 2 + 0 + 6 + 9 + 502 + 6 + 95 + 0 + 6 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 64548651 + ... + 64868469.

It is an arithmetic number, because the mean of its divisors is an integer number (170440777104).

Almost surely, 2^{20695026950640} is an apocalyptic number.

20695026950640 is a gapful number since it is divisible by the number (20) 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 20695026950640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40905786504960).

20695026950640 is an abundant number, since it is smaller than the sum of its proper divisors (61116546059280).

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

20695026950640 is a wasteful number, since it uses less digits than its factorization.

20695026950640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320229 (or 320220 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 20695026950640 in words is "twenty trillion, six hundred ninety-five billion, twenty-six million, nine hundred fifty thousand, six hundred forty".