21034340300 has 36 divisors (see below), whose sum is σ = 45654473760. Its totient is φ = 8411901120.

The previous prime is 21034340269. The next prime is 21034340303. The reversal of 21034340300 is 304343012.

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 (21034340303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 496346 + ... + 537054.

Almost surely, 2^21034340300 is an apocalyptic number.

21034340300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21034340300 is an abundant number, since it is smaller than the sum of its proper divisors (24620133460).

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

21034340300 is a wasteful number, since it uses less digits than its factorization.

21034340300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45890 (or 45883 counting only the distinct ones).

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

Adding to 21034340300 its reverse (304343012), we get a palindrome (21338683312).

The spelling of 21034340300 in words is "twenty-one billion, thirty-four million, three hundred forty thousand, three hundred".