21013431302 has 16 divisors (see below), whose sum is σ = 31695959232. Its totient is φ = 10448275200.

The previous prime is 21013431287. The next prime is 21013431323. The reversal of 21013431302 is 20313431012.

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, 218552 + ... + 299652.

It is an arithmetic number, because the mean of its divisors is an integer number (1980997452).

Almost surely, 2^21013431302 is an apocalyptic number.

21013431302 is a deficient number, since it is larger than the sum of its proper divisors (10682527930).

21013431302 is a wasteful number, since it uses less digits than its factorization.

21013431302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81823.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21013431302 its reverse (20313431012), we get a palindrome (41326862314).

The spelling of 21013431302 in words is "twenty-one billion, thirteen million, four hundred thirty-one thousand, three hundred two".