503040442026421 has 16 divisors (see below), whose sum is σ = 559515064135104. Its totient is φ = 449307551395584.

The previous prime is 503040442026403. The next prime is 503040442026443. The reversal of 503040442026421 is 124620244040305.

It is a cyclic number.

It is not a de Polignac number, because 503040442026421 - 2⁴⁵ = 467856069937589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503040442086421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4205049796 + ... + 4205169421.

It is an arithmetic number, because the mean of its divisors is an integer number (34969691508444).

Almost surely, 2^{503040442026421} is an apocalyptic number.

It is an amenable number.

503040442026421 is a deficient number, since it is larger than the sum of its proper divisors (56474622108683).

503040442026421 is a wasteful number, since it uses less digits than its factorization.

503040442026421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8410219380.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 503040442026421 its reverse (124620244040305), we get a palindrome (627660686066726).

The spelling of 503040442026421 in words is "five hundred three trillion, forty billion, four hundred forty-two million, twenty-six thousand, four hundred twenty-one".