20896636746 has 8 divisors (see below), whose sum is σ = 41793273504. Its totient is φ = 6965545580.

The previous prime is 20896636727. The next prime is 20896636751. The reversal of 20896636746 is 64763669802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

20896636746 is an admirable number.

It is a super-3 number, since 3×20896636746³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1741386390 + ... + 1741386401.

It is an arithmetic number, because the mean of its divisors is an integer number (5224159188).

Almost surely, 2^20896636746 is an apocalyptic number.

20896636746 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20896636746 is a wasteful number, since it uses less digits than its factorization.

20896636746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482772796.

The product of its (nonzero) digits is 15676416, while the sum is 57.

The spelling of 20896636746 in words is "twenty billion, eight hundred ninety-six million, six hundred thirty-six thousand, seven hundred forty-six".