21141240032404 has 24 divisors (see below), whose sum is σ = 37663961769000. Its totient is φ = 10381702341120.

The previous prime is 21141240032351. The next prime is 21141240032441. The reversal of 21141240032404 is 40423004214112.

It can be written as a sum of positive squares in 4 ways, for example, as 16001744004 + 21125238288400 = 126498^2 + 4596220^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199227177 + ... + 199333264.

It is an arithmetic number, because the mean of its divisors is an integer number (1569331740375).

Almost surely, 2^{21141240032404} is an apocalyptic number.

It is an amenable number.

21141240032404 is a deficient number, since it is larger than the sum of its proper divisors (16522721736596).

21141240032404 is a wasteful number, since it uses less digits than its factorization.

21141240032404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398560683 (or 398560681 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21141240032404 its reverse (40423004214112), we get a palindrome (61564244246516).

The spelling of 21141240032404 in words is "twenty-one trillion, one hundred forty-one billion, two hundred forty million, thirty-two thousand, four hundred four".