21042100413 has 12 divisors (see below), whose sum is σ = 31715629920. Its totient is φ = 13418150856.

The previous prime is 21042100399. The next prime is 21042100447. The reversal of 21042100413 is 31400124012.

21042100413 is a `hidden beast` number, since 210 + 42 + 1 + 0 + 0 + 413 = 666.

It is not a de Polignac number, because 21042100413 - 2⁴ = 21042100397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21042100463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50826123 + ... + 50826536.

It is an arithmetic number, because the mean of its divisors is an integer number (2642969160).

Almost surely, 2^21042100413 is an apocalyptic number.

21042100413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21042100413 is a deficient number, since it is larger than the sum of its proper divisors (10673529507).

21042100413 is a wasteful number, since it uses less digits than its factorization.

21042100413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101652688 (or 101652685 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21042100413 its reverse (31400124012), we get a palindrome (52442224425).

The spelling of 21042100413 in words is "twenty-one billion, forty-two million, one hundred thousand, four hundred thirteen".