21034423410 has 384 divisors, whose sum is σ = 70180895232. Its totient is φ = 3923251200.

The previous prime is 21034423337. The next prime is 21034423411. The reversal of 21034423410 is 1432443012.

It is not an unprimeable number, because it can be changed into a prime (21034423411) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 12221350 + ... + 12223070.

It is an arithmetic number, because the mean of its divisors is an integer number (182762748).

Almost surely, 2^21034423410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21034423410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35090447616).

21034423410 is an abundant number, since it is smaller than the sum of its proper divisors (49146471822).

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

21034423410 is a wasteful number, since it uses less digits than its factorization.

21034423410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810 (or 1799 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21034423410 its reverse (1432443012), we get a palindrome (22466866422).

It can be divided in two parts, 21034 and 423410, that added together give a palindrome (444444).

The spelling of 21034423410 in words is "twenty-one billion, thirty-four million, four hundred twenty-three thousand, four hundred ten".