21404120345010 has 48 divisors (see below), whose sum is σ = 59931536969304. Its totient is φ = 5268706546176.

The previous prime is 21404120344951. The next prime is 21404120345059. The reversal of 21404120345010 is 1054302140412.

21404120345010 is a `hidden beast` number, since 2 + 1 + 4 + 0 + 4 + 1 + 203 + 450 + 1 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11229060258441 + 10175060086569 = 3350979^2 + 3189837^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9147058807 + ... + 9147061146.

Almost surely, 2^{21404120345010} is an apocalyptic number.

21404120345010 is an abundant number, since it is smaller than the sum of its proper divisors (38527416624294).

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

21404120345010 is a wasteful number, since it uses less digits than its factorization.

21404120345010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18294119979 (or 18294119976 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 21404120345010 its reverse (1054302140412), we get a palindrome (22458422485422).

The spelling of 21404120345010 in words is "twenty-one trillion, four hundred four billion, one hundred twenty million, three hundred forty-five thousand, ten".