20309767898112 has 1056 divisors, whose sum is σ = 76344930341120. Its totient is φ = 5220296294400.

The previous prime is 20309767898099. The next prime is 20309767898137. The reversal of 20309767898112 is 21189876790302.

It is a tau number, because it is divible by the number of its divisors (1056).

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

It is a self number, because there is not a number n which added to its sum of digits gives 20309767898112.

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, 2271527562 + ... + 2271536502.

Almost surely, 2^{20309767898112} is an apocalyptic number.

20309767898112 is a gapful number since it is divisible by the number (22) 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 20309767898112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38172465170560).

20309767898112 is an abundant number, since it is smaller than the sum of its proper divisors (56035162443008).

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

20309767898112 is a wasteful number, since it uses less digits than its factorization.

20309767898112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9096 (or 9061 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 20309767898112 in words is "twenty trillion, three hundred nine billion, seven hundred sixty-seven million, eight hundred ninety-eight thousand, one hundred twelve".