21193373 has 16 divisors (see below), whose sum is σ = 23794560. Its totient is φ = 18771456.

The previous prime is 21193369. The next prime is 21193387. The reversal of 21193373 is 37339112.

It is a cyclic number.

It is not a de Polignac number, because 21193373 - 2² = 21193369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21193343) 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, 25793 + ... + 26601.

It is an arithmetic number, because the mean of its divisors is an integer number (1487160).

Almost surely, 2^21193373 is an apocalyptic number.

21193373 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21193373 is a deficient number, since it is larger than the sum of its proper divisors (2601187).

21193373 is a wasteful number, since it uses less digits than its factorization.

21193373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916.

The product of its digits is 3402, while the sum is 29.

The square root of 21193373 is about 4603.6260708272. The cubic root of 21193373 is about 276.7366592805.

The spelling of 21193373 in words is "twenty-one million, one hundred ninety-three thousand, three hundred seventy-three".