21142432310 has 32 divisors (see below), whose sum is σ = 39401778240. Its totient is φ = 8158485888.

The previous prime is 21142432247. The next prime is 21142432319. The reversal of 21142432310 is 1323424112.

It is a super-2 number, since 2×21142432310² (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 (21142432319) 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, 321719 + ... + 381821.

It is an arithmetic number, because the mean of its divisors is an integer number (1231305570).

Almost surely, 2^21142432310 is an apocalyptic number.

21142432310 is a deficient number, since it is larger than the sum of its proper divisors (18259345930).

21142432310 is a wasteful number, since it uses less digits than its factorization.

21142432310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61352.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21142432310 its reverse (1323424112), we get a palindrome (22465856422).

The spelling of 21142432310 in words is "twenty-one billion, one hundred forty-two million, four hundred thirty-two thousand, three hundred ten".