2012454251819 has 6 divisors (see below), whose sum is σ = 2195409771084. Its totient is φ = 1829499588020.

The previous prime is 2012454251809. The next prime is 2012454251851. The reversal of 2012454251819 is 9181524542102.

It is not a de Polignac number, because 2012454251819 - 2¹⁶ = 2012454186283 is a prime.

It is a super-2 number, since 2×2012454251819² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012454251819.

It is not an unprimeable number, because it can be changed into a prime (2012454251809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4491134 + ... + 4918860.

It is an arithmetic number, because the mean of its divisors is an integer number (365901628514).

Almost surely, 2^{2012454251819} is an apocalyptic number.

2012454251819 is a deficient number, since it is larger than the sum of its proper divisors (182955519265).

2012454251819 is an frugal number, since it uses more digits than its factorization.

2012454251819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855465 (or 427738 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 44.

Multiplying 2012454251819 by its sum of digits (44), we get a square (88547987080036 = 9409994²).

The spelling of 2012454251819 in words is "two trillion, twelve billion, four hundred fifty-four million, two hundred fifty-one thousand, eight hundred nineteen".