21100463340 has 48 divisors (see below), whose sum is σ = 64452326400. Its totient is φ = 5115263680.

The previous prime is 21100463333. The next prime is 21100463353. The reversal of 21100463340 is 4336400112.

It is a self number, because there is not a number n which added to its sum of digits gives 21100463340.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15984540 + ... + 15985859.

It is an arithmetic number, because the mean of its divisors is an integer number (1342756800).

Almost surely, 2^21100463340 is an apocalyptic number.

21100463340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100463340 is an abundant number, since it is smaller than the sum of its proper divisors (43351863060).

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

21100463340 is a wasteful number, since it uses less digits than its factorization.

21100463340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31970422 (or 31970420 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21100463340 its reverse (4336400112), we get a palindrome (25436863452).

The spelling of 21100463340 in words is "twenty-one billion, one hundred million, four hundred sixty-three thousand, three hundred forty".