340451111820 has 24 divisors (see below), whose sum is σ = 953263113264. Its totient is φ = 90786963136.

The previous prime is 340451111809. The next prime is 340451111827. The reversal of 340451111820 is 28111154043.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (340451111827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2837092539 + ... + 2837092658.

It is an arithmetic number, because the mean of its divisors is an integer number (39719296386).

Almost surely, 2^340451111820 is an apocalyptic number.

340451111820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

340451111820 is an abundant number, since it is smaller than the sum of its proper divisors (612812001444).

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

340451111820 is a wasteful number, since it uses less digits than its factorization.

340451111820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5674185209 (or 5674185207 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

Adding to 340451111820 its reverse (28111154043), we get a palindrome (368562265863).

The spelling of 340451111820 in words is "three hundred forty billion, four hundred fifty-one million, one hundred eleven thousand, eight hundred twenty".