21093190 has 32 divisors (see below), whose sum is σ = 39015360. Its totient is φ = 8208000.

The previous prime is 21093169. The next prime is 21093199. The reversal of 21093190 is 9139012.

It is a super-2 number, since 2×21093190² = 889845328752200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21093199) 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, 91996 + ... + 92224.

It is an arithmetic number, because the mean of its divisors is an integer number (1219230).

Almost surely, 2^21093190 is an apocalyptic number.

21093190 is a deficient number, since it is larger than the sum of its proper divisors (17922170).

21093190 is a wasteful number, since it uses less digits than its factorization.

21093190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 21093190 is about 4592.7323022358. The cubic root of 21093190 is about 276.2999172710.

The spelling of 21093190 in words is "twenty-one million, ninety-three thousand, one hundred ninety".