20747917926736 has 240 divisors, whose sum is σ = 56709603353088. Its totient is φ = 7221084595200.

The previous prime is 20747917926713. The next prime is 20747917926763. The reversal of 20747917926736 is 63762971974702.

It is a happy number.

It is a super-2 number, since 2×20747917926736² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 490566 + ... + 6460378.

Almost surely, 2^{20747917926736} is an apocalyptic number.

20747917926736 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 20747917926736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28354801676544).

20747917926736 is an abundant number, since it is smaller than the sum of its proper divisors (35961685426352).

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

20747917926736 is a wasteful number, since it uses less digits than its factorization.

20747917926736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969890 (or 5969877 counting only the distinct ones).

The product of its (nonzero) digits is 336063168, while the sum is 70.

The spelling of 20747917926736 in words is "twenty trillion, seven hundred forty-seven billion, nine hundred seventeen million, nine hundred twenty-six thousand, seven hundred thirty-six".