21063351000 has 64 divisors (see below), whose sum is σ = 65717664480. Its totient is φ = 5616892800.

The previous prime is 21063350977. The next prime is 21063351007. The reversal of 21063351000 is 15336012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21063351007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3507559 + ... + 3513558.

Almost surely, 2^21063351000 is an apocalyptic number.

21063351000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21063351000 is an abundant number, since it is smaller than the sum of its proper divisors (44654313480).

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

21063351000 is a wasteful number, since it uses less digits than its factorization.

21063351000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7021141 (or 7021127 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 21063351000 its reverse (15336012), we get a palindrome (21078687012).

The spelling of 21063351000 in words is "twenty-one billion, sixty-three million, three hundred fifty-one thousand".