21860203000 has 64 divisors (see below), whose sum is σ = 53845178400. Its totient is φ = 8283859200.

The previous prime is 21860202997. The next prime is 21860203021. The reversal of 21860203000 is 30206812.

It is a congruent number.

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, 556269 + ... + 594268.

Almost surely, 2^21860203000 is an apocalyptic number.

21860203000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21860203000 is an abundant number, since it is smaller than the sum of its proper divisors (31984975400).

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

21860203000 is a wasteful number, since it uses less digits than its factorization.

21860203000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150577 (or 1150563 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21860203000 its reverse (30206812), we get a palindrome (21890409812).

The spelling of 21860203000 in words is "twenty-one billion, eight hundred sixty million, two hundred three thousand".