21319000 has 32 divisors (see below), whose sum is σ = 49888800. Its totient is φ = 8527200.

The previous prime is 21318991. The next prime is 21319027. The reversal of 21319000 is 91312.

It is a super-2 number, since 2×21319000² = 908999522000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9660 + ... + 11659.

It is an arithmetic number, because the mean of its divisors is an integer number (1559025).

Almost surely, 2^21319000 is an apocalyptic number.

21319000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21319000 is an abundant number, since it is smaller than the sum of its proper divisors (28569800).

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

21319000 is a wasteful number, since it uses less digits than its factorization.

21319000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21340 (or 21326 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 21319000 is about 4617.2502639558. The cubic root of 21319000 is about 277.2823822100.

The spelling of 21319000 in words is "twenty-one million, three hundred nineteen thousand".