21032134410 has 64 divisors (see below), whose sum is σ = 57819801600. Its totient is φ = 4796373312.

The previous prime is 21032134313. The next prime is 21032134411. The reversal of 21032134410 is 1443123012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21032134411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21880 + ... + 206259.

It is an arithmetic number, because the mean of its divisors is an integer number (903434400).

Almost surely, 2^21032134410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21032134410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28909900800).

21032134410 is an abundant number, since it is smaller than the sum of its proper divisors (36787667190).

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

21032134410 is a wasteful number, since it uses less digits than its factorization.

21032134410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228595.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21032134410 its reverse (1443123012), we get a palindrome (22475257422).

The spelling of 21032134410 in words is "twenty-one billion, thirty-two million, one hundred thirty-four thousand, four hundred ten".