21403213041 has 16 divisors (see below), whose sum is σ = 33739056000. Its totient is φ = 11808668928.

The previous prime is 21403213033. The next prime is 21403213087. The reversal of 21403213041 is 14031230412.

It is not a de Polignac number, because 21403213041 - 2³ = 21403213033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21403212999 and 21403213017.

It is not an unprimeable number, because it can be changed into a prime (21403213001) 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, 17571816 + ... + 17573033.

It is an arithmetic number, because the mean of its divisors is an integer number (2108691000).

Almost surely, 2^21403213041 is an apocalyptic number.

21403213041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21403213041 is a deficient number, since it is larger than the sum of its proper divisors (12335842959).

21403213041 is a wasteful number, since it uses less digits than its factorization.

21403213041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35144888.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21403213041 its reverse (14031230412), we get a palindrome (35434443453).

The spelling of 21403213041 in words is "twenty-one billion, four hundred three million, two hundred thirteen thousand, forty-one".