20997570097948 has 12 divisors (see below), whose sum is σ = 36746080443072. Its totient is φ = 10498689971360.

The previous prime is 20997570097913. The next prime is 20997570097951. The reversal of 20997570097948 is 84979007579902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23271340 + ... + 24156787.

It is an arithmetic number, because the mean of its divisors is an integer number (3062173370256).

Almost surely, 2^{20997570097948} is an apocalyptic number.

It is an amenable number.

20997570097948 is a deficient number, since it is larger than the sum of its proper divisors (15748510345124).

20997570097948 is a wasteful number, since it uses less digits than its factorization.

20997570097948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47538812 (or 47538810 counting only the distinct ones).

The product of its (nonzero) digits is 720135360, while the sum is 76.

The spelling of 20997570097948 in words is "twenty trillion, nine hundred ninety-seven billion, five hundred seventy million, ninety-seven thousand, nine hundred forty-eight".