21302010431 has 12 divisors (see below), whose sum is σ = 23079345120. Its totient is φ = 19652592960.

The previous prime is 21302010427. The next prime is 21302010439. The reversal of 21302010431 is 13401020312.

It is not a de Polignac number, because 21302010431 - 2² = 21302010427 is a prime.

It is a super-2 number, since 2×21302010431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302010439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282515 + ... + 349883.

It is an arithmetic number, because the mean of its divisors is an integer number (1923278760).

Almost surely, 2^21302010431 is an apocalyptic number.

21302010431 is a deficient number, since it is larger than the sum of its proper divisors (1777334689).

21302010431 is a wasteful number, since it uses less digits than its factorization.

21302010431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69266 (or 69253 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21302010431 its reverse (13401020312), we get a palindrome (34703030743).

The spelling of 21302010431 in words is "twenty-one billion, three hundred two million, ten thousand, four hundred thirty-one".