20826709997 has 8 divisors (see below), whose sum is σ = 20984951232. Its totient is φ = 20668559200.

The previous prime is 20826709993. The next prime is 20826710053. The reversal of 20826709997 is 79990762802.

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

It is a cyclic number.

It is not a de Polignac number, because 20826709997 - 2² = 20826709993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20826709991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482222 + ... + 523632.

It is an arithmetic number, because the mean of its divisors is an integer number (2623118904).

Almost surely, 2^20826709997 is an apocalyptic number.

It is an amenable number.

20826709997 is a deficient number, since it is larger than the sum of its proper divisors (158241235).

20826709997 is a wasteful number, since it uses less digits than its factorization.

20826709997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45219.

The product of its (nonzero) digits is 6858432, while the sum is 59.

The spelling of 20826709997 in words is "twenty billion, eight hundred twenty-six million, seven hundred nine thousand, nine hundred ninety-seven".