21412201340 has 12 divisors (see below), whose sum is σ = 44965622856. Its totient is φ = 8564880528.

The previous prime is 21412201339. The next prime is 21412201379. The reversal of 21412201340 is 4310221412.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1070610067 = 21412201340 / (2 + 1 + 4 + 1 + 2 + 2 + 0 + 1 + 3 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535305014 + ... + 535305053.

It is an arithmetic number, because the mean of its divisors is an integer number (3747135238).

Almost surely, 2^21412201340 is an apocalyptic number.

21412201340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21412201340 is an abundant number, since it is smaller than the sum of its proper divisors (23553421516).

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

21412201340 is a wasteful number, since it uses less digits than its factorization.

21412201340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070610076 (or 1070610074 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21412201340 its reverse (4310221412), we get a palindrome (25722422752).

The spelling of 21412201340 in words is "twenty-one billion, four hundred twelve million, two hundred one thousand, three hundred forty".