21423111010 has 32 divisors (see below), whose sum is σ = 44506755072. Its totient is φ = 7272340800.

The previous prime is 21423110999. The next prime is 21423111011. The reversal of 21423111010 is 1011132412.

It is not an unprimeable number, because it can be changed into a prime (21423111011) 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, 1508002 + ... + 1522141.

It is an arithmetic number, because the mean of its divisors is an integer number (1390836096).

Almost surely, 2^21423111010 is an apocalyptic number.

21423111010 is an abundant number, since it is smaller than the sum of its proper divisors (23083644062).

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

21423111010 is a wasteful number, since it uses less digits than its factorization.

21423111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030258.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21423111010 its reverse (1011132412), we get a palindrome (22434243422).

The spelling of 21423111010 in words is "twenty-one billion, four hundred twenty-three million, one hundred eleven thousand, ten".