20743890785100 has 432 divisors, whose sum is σ = 78634133760000. Its totient is φ = 4741458845760.

The previous prime is 20743890785081. The next prime is 20743890785117. The reversal of 20743890785100 is 158709834702.

It is a happy number.

20743890785100 is a `hidden beast` number, since 2 + 0 + 7 + 4 + 38 + 90 + 7 + 8 + 510 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7090501 + ... + 9579299.

Almost surely, 2^{20743890785100} is an apocalyptic number.

20743890785100 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 20743890785100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39317066880000).

20743890785100 is an abundant number, since it is smaller than the sum of its proper divisors (57890242974900).

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

20743890785100 is a wasteful number, since it uses less digits than its factorization.

20743890785100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488849 (or 2488816 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 20743890785100 in words is "twenty trillion, seven hundred forty-three billion, eight hundred ninety million, seven hundred eighty-five thousand, one hundred".