21031400404413 has 40 divisors (see below), whose sum is σ = 35982345402432. Its totient is φ = 11992208583744.

The previous prime is 21031400404351. The next prime is 21031400404463. The reversal of 21031400404413 is 31440400413012.

21031400404413 is a `hidden beast` number, since 2 + 103 + 140 + 0 + 4 + 0 + 4 + 413 = 666.

It is not a de Polignac number, because 21031400404413 - 2¹⁶ = 21031400338877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031400404463) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 39448720 + ... + 39978297.

Almost surely, 2^{21031400404413} is an apocalyptic number.

It is an amenable number.

21031400404413 is a deficient number, since it is larger than the sum of its proper divisors (14950944998019).

21031400404413 is an equidigital number, since it uses as much as digits as its factorization.

21031400404413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79427503 (or 79427494 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21031400404413 its reverse (31440400413012), we get a palindrome (52471800817425).

The spelling of 21031400404413 in words is "twenty-one trillion, thirty-one billion, four hundred million, four hundred four thousand, four hundred thirteen".