21411204313240 has 32 divisors (see below), whose sum is σ = 55057382520480. Its totient is φ = 7340984335872.

The previous prime is 21411204313231. The next prime is 21411204313253. The reversal of 21411204313240 is 4231340211412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 21411204313199 and 21411204313208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38234293137 + ... + 38234293696.

It is an arithmetic number, because the mean of its divisors is an integer number (1720543203765).

Almost surely, 2^{21411204313240} is an apocalyptic number.

21411204313240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21411204313240 is an abundant number, since it is smaller than the sum of its proper divisors (33646178207240).

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

21411204313240 is a wasteful number, since it uses less digits than its factorization.

21411204313240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76468586851 (or 76468586847 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21411204313240 its reverse (4231340211412), we get a palindrome (25642544524652).

The spelling of 21411204313240 in words is "twenty-one trillion, four hundred eleven billion, two hundred four million, three hundred thirteen thousand, two hundred forty".