21030223340 has 48 divisors (see below), whose sum is σ = 53128992000. Its totient is φ = 6830868672.

The previous prime is 21030223339. The next prime is 21030223349. The reversal of 21030223340 is 4332203012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (21030223349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3950390 + ... + 3955709.

It is an arithmetic number, because the mean of its divisors is an integer number (1106854000).

Almost surely, 2^21030223340 is an apocalyptic number.

21030223340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21030223340 is an abundant number, since it is smaller than the sum of its proper divisors (32098768660).

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

21030223340 is a wasteful number, since it uses less digits than its factorization.

21030223340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7906134 (or 7906132 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21030223340 its reverse (4332203012), we get a palindrome (25362426352).

The spelling of 21030223340 in words is "twenty-one billion, thirty million, two hundred twenty-three thousand, three hundred forty".