21130403302 has 16 divisors (see below), whose sum is σ = 31842238032. Its totient is φ = 10516366080.

The previous prime is 21130403293. The next prime is 21130403321. The reversal of 21130403302 is 20330403112.

It is a self number, because there is not a number n which added to its sum of digits gives 21130403302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1136493 + ... + 1154935.

It is an arithmetic number, because the mean of its divisors is an integer number (1990139877).

Almost surely, 2^21130403302 is an apocalyptic number.

21130403302 is a deficient number, since it is larger than the sum of its proper divisors (10711834730).

21130403302 is a wasteful number, since it uses less digits than its factorization.

21130403302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21063.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21130403302 its reverse (20330403112), we get a palindrome (41460806414).

The spelling of 21130403302 in words is "twenty-one billion, one hundred thirty million, four hundred three thousand, three hundred two".