21031031350 has 24 divisors (see below), whose sum is σ = 44705964528. Its totient is φ = 7210639200.

The previous prime is 21031031327. The next prime is 21031031401. The reversal of 21031031350 is 5313013012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30043981 + ... + 30044680.

It is an arithmetic number, because the mean of its divisors is an integer number (1862748522).

Almost surely, 2^21031031350 is an apocalyptic number.

21031031350 is an abundant number, since it is smaller than the sum of its proper divisors (23674933178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21031031350 is a wasteful number, since it uses less digits than its factorization.

21031031350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60088680 (or 60088675 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 19.

Adding to 21031031350 its reverse (5313013012), we get a palindrome (26344044362).

The spelling of 21031031350 in words is "twenty-one billion, thirty-one million, thirty-one thousand, three hundred fifty".