20889726315696 has 160 divisors (see below), whose sum is σ = 70737697894400. Its totient is φ = 5775961167360.

The previous prime is 20889726315631. The next prime is 20889726315697. The reversal of 20889726315696 is 69651362798802.

It is a happy number.

20889726315696 is a `hidden beast` number, since 2 + 0 + 8 + 8 + 9 + 7 + 26 + 31 + 569 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (20889726315697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111325261 + ... + 111512748.

It is an arithmetic number, because the mean of its divisors is an integer number (442110611840).

Almost surely, 2^{20889726315696} is an apocalyptic number.

It is an amenable number.

20889726315696 is an abundant number, since it is smaller than the sum of its proper divisors (49847971578704).

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

20889726315696 is a wasteful number, since it uses less digits than its factorization.

20889726315696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222838064 (or 222838052 counting only the distinct ones).

The product of its (nonzero) digits is 470292480, while the sum is 72.

The spelling of 20889726315696 in words is "twenty trillion, eight hundred eighty-nine billion, seven hundred twenty-six million, three hundred fifteen thousand, six hundred ninety-six".