19812354396045 has 32 divisors (see below), whose sum is σ = 33127119286272. Its totient is φ = 10101261721152.

The previous prime is 19812354396017. The next prime is 19812354396049. The reversal of 19812354396045 is 54069345321891.

It is a happy number.

It is not a de Polignac number, because 19812354396045 - 2¹⁴ = 19812354379661 is a prime.

It is a super-3 number, since 3×19812354396045³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19812354396045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19812354396049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 326744457 + ... + 326805086.

It is an arithmetic number, because the mean of its divisors is an integer number (1035222477696).

Almost surely, 2^{19812354396045} is an apocalyptic number.

19812354396045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19812354396045 is a deficient number, since it is larger than the sum of its proper divisors (13314764890227).

19812354396045 is a wasteful number, since it uses less digits than its factorization.

19812354396045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653549641.

The product of its (nonzero) digits is 27993600, while the sum is 60.

The spelling of 19812354396045 in words is "nineteen trillion, eight hundred twelve billion, three hundred fifty-four million, three hundred ninety-six thousand, forty-five".