21203302413 has 16 divisors (see below), whose sum is σ = 28755648000. Its totient is φ = 13893336240.

The previous prime is 21203302409. The next prime is 21203302423. The reversal of 21203302413 is 31420330212.

It is not a de Polignac number, because 21203302413 - 2² = 21203302409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21203302413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203302423) 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, 1515058 + ... + 1528988.

It is an arithmetic number, because the mean of its divisors is an integer number (1797228000).

Almost surely, 2^21203302413 is an apocalyptic number.

It is an amenable number.

21203302413 is a deficient number, since it is larger than the sum of its proper divisors (7552345587).

21203302413 is a wasteful number, since it uses less digits than its factorization.

21203302413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22592.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21203302413 its reverse (31420330212), we get a palindrome (52623632625).

The spelling of 21203302413 in words is "twenty-one billion, two hundred three million, three hundred two thousand, four hundred thirteen".