20869899837696 has 1296 divisors, whose sum is σ = 78506931484800. Its totient is φ = 5412752916480.

The previous prime is 20869899837659. The next prime is 20869899837707. The reversal of 20869899837696 is 69673899896802.

20869899837696 is a `hidden beast` number, since 2 + 0 + 8 + 69 + 8 + 9 + 98 + 376 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (1296).

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, 4489113580 + ... + 4489118228.

Almost surely, 2^{20869899837696} is an apocalyptic number.

20869899837696 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 20869899837696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39253465742400).

20869899837696 is an abundant number, since it is smaller than the sum of its proper divisors (57637031647104).

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

20869899837696 is an equidigital number, since it uses as much as digits as its factorization.

20869899837696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4774 (or 4735 counting only the distinct ones).

The product of its (nonzero) digits is 30474952704, while the sum is 90.

The spelling of 20869899837696 in words is "twenty trillion, eight hundred sixty-nine billion, eight hundred ninety-nine million, eight hundred thirty-seven thousand, six hundred ninety-six".