21102433340 has 24 divisors (see below), whose sum is σ = 44347443840. Its totient is φ = 8434814528.

The previous prime is 21102433333. The next prime is 21102433343. The reversal of 21102433340 is 4333420112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102433343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356780 + ... + 411699.

It is an arithmetic number, because the mean of its divisors is an integer number (1847810160).

Almost surely, 2^21102433340 is an apocalyptic number.

21102433340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102433340 is an abundant number, since it is smaller than the sum of its proper divisors (23245010500).

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

21102433340 is a wasteful number, since it uses less digits than its factorization.

21102433340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769861 (or 769859 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21102433340 its reverse (4333420112), we get a palindrome (25435853452).

The spelling of 21102433340 in words is "twenty-one billion, one hundred two million, four hundred thirty-three thousand, three hundred forty".