19700823811245 has 16 divisors (see below), whose sum is σ = 31550210258112. Its totient is φ = 10497475312640.

The previous prime is 19700823811187. The next prime is 19700823811247. The reversal of 19700823811245 is 54211832800791.

It is a happy number.

It is not a de Polignac number, because 19700823811245 - 2¹⁸ = 19700823549101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19700823811247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601903092 + ... + 601935821.

It is an arithmetic number, because the mean of its divisors is an integer number (1971888141132).

Almost surely, 2^{19700823811245} is an apocalyptic number.

19700823811245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19700823811245 is a deficient number, since it is larger than the sum of its proper divisors (11849386446867).

19700823811245 is a wasteful number, since it uses less digits than its factorization.

19700823811245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203840012.

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 19700823811245 in words is "nineteen trillion, seven hundred billion, eight hundred twenty-three million, eight hundred eleven thousand, two hundred forty-five".