21044232030 has 64 divisors (see below), whose sum is σ = 52868878848. Its totient is φ = 5350815360.

The previous prime is 21044232029. The next prime is 21044232031. The reversal of 21044232030 is 3023244012.

It is an interprime number because it is at equal distance from previous prime (21044232029) and next prime (21044232031).

It is a junction number, because it is equal to n+sod(n) for n = 21044231988 and 21044232006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044232031) 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, 170625 + ... + 266835.

It is an arithmetic number, because the mean of its divisors is an integer number (826076232).

Almost surely, 2^21044232030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21044232030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26434439424).

21044232030 is an abundant number, since it is smaller than the sum of its proper divisors (31824646818).

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

21044232030 is a wasteful number, since it uses less digits than its factorization.

21044232030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96561.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21044232030 its reverse (3023244012), we get a palindrome (24067476042).

The spelling of 21044232030 in words is "twenty-one billion, forty-four million, two hundred thirty-two thousand, thirty".