21434021110 has 16 divisors (see below), whose sum is σ = 38582914032. Its totient is φ = 8573236000.

The previous prime is 21434021051. The next prime is 21434021111. The reversal of 21434021110 is 1112043412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434021111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390780 + ... + 442240.

It is an arithmetic number, because the mean of its divisors is an integer number (2411432127).

Almost surely, 2^21434021110 is an apocalyptic number.

21434021110 is a deficient number, since it is larger than the sum of its proper divisors (17148892922).

21434021110 is a wasteful number, since it uses less digits than its factorization.

21434021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93119.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21434021110 its reverse (1112043412), we get a palindrome (22546064522).

The spelling of 21434021110 in words is "twenty-one billion, four hundred thirty-four million, twenty-one thousand, one hundred ten".