20826623736 has 24 divisors (see below), whose sum is σ = 56405439480. Its totient is φ = 6942207888.

The previous prime is 20826623723. The next prime is 20826623747. The reversal of 20826623736 is 63732662802.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 20826623691 and 20826623700.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 144629260 + ... + 144629403.

It is an arithmetic number, because the mean of its divisors is an integer number (2350226645).

Almost surely, 2^20826623736 is an apocalyptic number.

It is an amenable number.

20826623736 is an abundant number, since it is smaller than the sum of its proper divisors (35578815744).

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

20826623736 is a wasteful number, since it uses less digits than its factorization.

20826623736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289258675 (or 289258668 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 20826623736 in words is "twenty billion, eight hundred twenty-six million, six hundred twenty-three thousand, seven hundred thirty-six".