20366606778336 has 720 divisors, whose sum is σ = 78026759395200. Its totient is φ = 5088692284416.

The previous prime is 20366606778293. The next prime is 20366606778359. The reversal of 20366606778336 is 63387760666302.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 58085595 + ... + 58435173.

It is an arithmetic number, because the mean of its divisors is an integer number (108370499160).

Almost surely, 2^{20366606778336} is an apocalyptic number.

20366606778336 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 20366606778336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39013379697600).

20366606778336 is an abundant number, since it is smaller than the sum of its proper divisors (57660152616864).

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

20366606778336 is a wasteful number, since it uses less digits than its factorization.

20366606778336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349653 (or 349623 counting only the distinct ones).

The product of its (nonzero) digits is 164602368, while the sum is 63.

The spelling of 20366606778336 in words is "twenty trillion, three hundred sixty-six billion, six hundred six million, seven hundred seventy-eight thousand, three hundred thirty-six".