21000423014 has 16 divisors (see below), whose sum is σ = 31575740976. Its totient is φ = 10475203200.

The previous prime is 21000422977. The next prime is 21000423049. The reversal of 21000423014 is 41032400012.

It is a junction number, because it is equal to n+sod(n) for n = 21000422983 and 21000423001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1821809 + ... + 1833299.

It is an arithmetic number, because the mean of its divisors is an integer number (1973483811).

Almost surely, 2^21000423014 is an apocalyptic number.

21000423014 is a deficient number, since it is larger than the sum of its proper divisors (10575317962).

21000423014 is a wasteful number, since it uses less digits than its factorization.

21000423014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13591.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21000423014 its reverse (41032400012), we get a palindrome (62032823026).

The spelling of 21000423014 in words is "twenty-one billion, four hundred twenty-three thousand, fourteen".