21350207000 has 64 divisors (see below), whose sum is σ = 50092192800. Its totient is φ = 8517398400.

The previous prime is 21350206961. The next prime is 21350207029. The reversal of 21350207000 is 70205312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350834 + ... + 407166.

Almost surely, 2^21350207000 is an apocalyptic number.

21350207000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21350207000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25046096400).

21350207000 is an abundant number, since it is smaller than the sum of its proper divisors (28741985800).

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

21350207000 is a wasteful number, since it uses less digits than its factorization.

21350207000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56733 (or 56719 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The spelling of 21350207000 in words is "twenty-one billion, three hundred fifty million, two hundred seven thousand".