21302103040 has 44 divisors (see below), whose sum is σ = 51100096176. Its totient is φ = 8520839168.

The previous prime is 21302103013. The next prime is 21302103071. The reversal of 21302103040 is 4030120312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2075164 + ... + 2085403.

Almost surely, 2^21302103040 is an apocalyptic number.

21302103040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302103040 is an abundant number, since it is smaller than the sum of its proper divisors (29797993136).

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

21302103040 is an equidigital number, since it uses as much as digits as its factorization.

21302103040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160592 (or 4160574 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21302103040 its reverse (4030120312), we get a palindrome (25332223352).

The spelling of 21302103040 in words is "twenty-one billion, three hundred two million, one hundred three thousand, forty".