340403413021 has 12 divisors (see below), whose sum is σ = 396499864860. Its totient is φ = 291390912960.

The previous prime is 340403413013. The next prime is 340403413171. The reversal of 340403413021 is 120314304043.

It can be written as a sum of positive squares in 2 ways, for example, as 27406802500 + 312996610521 = 165550^2 + 559461^2 .

It is not a de Polignac number, because 340403413021 - 2³ = 340403413013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340404413021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4527106 + ... + 4601683.

It is an arithmetic number, because the mean of its divisors is an integer number (33041655405).

Almost surely, 2^340403413021 is an apocalyptic number.

It is an amenable number.

340403413021 is a deficient number, since it is larger than the sum of its proper divisors (56096451839).

340403413021 is an equidigital number, since it uses as much as digits as its factorization.

340403413021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9129564 (or 9129557 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 340403413021 its reverse (120314304043), we get a palindrome (460717717064).

It can be divided in two parts, 340403 and 413021, that added together give a square (753424 = 868²).

The spelling of 340403413021 in words is "three hundred forty billion, four hundred three million, four hundred thirteen thousand, twenty-one".