21001410340 has 12 divisors (see below), whose sum is σ = 44102961756. Its totient is φ = 8400564128.

The previous prime is 21001410329. The next prime is 21001410347. The reversal of 21001410340 is 4301410012.

It can be written as a sum of positive squares in 2 ways, for example, as 8509324516 + 12492085824 = 92246^2 + 111768^2 .

It is not an unprimeable number, because it can be changed into a prime (21001410347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525035239 + ... + 525035278.

It is an arithmetic number, because the mean of its divisors is an integer number (3675246813).

Almost surely, 2^21001410340 is an apocalyptic number.

21001410340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001410340 is an abundant number, since it is smaller than the sum of its proper divisors (23101551416).

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

21001410340 is a wasteful number, since it uses less digits than its factorization.

21001410340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050070526 (or 1050070524 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21001410340 its reverse (4301410012), we get a palindrome (25302820352).

The spelling of 21001410340 in words is "twenty-one billion, one million, four hundred ten thousand, three hundred forty".