20826709998 has 16 divisors (see below), whose sum is σ = 42779188560. Its totient is φ = 6754608576.

The previous prime is 20826709993. The next prime is 20826710053. The reversal of 20826709998 is 89990762802.

It is a happy 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, 46906783 + ... + 46907226.

It is an arithmetic number, because the mean of its divisors is an integer number (2673699285).

Almost surely, 2^20826709998 is an apocalyptic number.

20826709998 is an abundant number, since it is smaller than the sum of its proper divisors (21952478562).

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

20826709998 is a wasteful number, since it uses less digits than its factorization.

20826709998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93814051.

The product of its (nonzero) digits is 7838208, while the sum is 60.

The spelling of 20826709998 in words is "twenty billion, eight hundred twenty-six million, seven hundred nine thousand, nine hundred ninety-eight".