21041440140430 has 16 divisors (see below), whose sum is σ = 37874993509584. Its totient is φ = 8416486888000.

The previous prime is 21041440140389. The next prime is 21041440140517. The reversal of 21041440140430 is 3404104414012.

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, 10150696 + ... + 12046555.

It is an arithmetic number, because the mean of its divisors is an integer number (2367187094349).

Almost surely, 2^{21041440140430} is an apocalyptic number.

21041440140430 is a deficient number, since it is larger than the sum of its proper divisors (16833553369154).

21041440140430 is a wasteful number, since it uses less digits than its factorization.

21041440140430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22292051.

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

Adding to 21041440140430 its reverse (3404104414012), we get a palindrome (24445544554442).

The spelling of 21041440140430 in words is "twenty-one trillion, forty-one billion, four hundred forty million, one hundred forty thousand, four hundred thirty".