21223035040 has 48 divisors (see below), whose sum is σ = 50173790688. Its totient is φ = 8483394816.

The previous prime is 21223035037. The next prime is 21223035049. The reversal of 21223035040 is 4053032212.

It is not an unprimeable number, because it can be changed into a prime (21223035049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192559 + ... + 282001.

It is an arithmetic number, because the mean of its divisors is an integer number (1045287306).

Almost surely, 2^21223035040 is an apocalyptic number.

21223035040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223035040 is an abundant number, since it is smaller than the sum of its proper divisors (28950755648).

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

21223035040 is a wasteful number, since it uses less digits than its factorization.

21223035040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90941 (or 90933 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 21223035040 its reverse (4053032212), we get a palindrome (25276067252).

The spelling of 21223035040 in words is "twenty-one billion, two hundred twenty-three million, thirty-five thousand, forty".