21373190 has 16 divisors (see below), whose sum is σ = 38571120. Its totient is φ = 8527200.

The previous prime is 21373171. The next prime is 21373207. The reversal of 21373190 is 9137312.

It is a super-2 number, since 2×21373190² = 913626501552200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1640 + ... + 6740.

It is an arithmetic number, because the mean of its divisors is an integer number (2410695).

Almost surely, 2^21373190 is an apocalyptic number.

21373190 is a deficient number, since it is larger than the sum of its proper divisors (17197930).

21373190 is a wasteful number, since it uses less digits than its factorization.

21373190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5527.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 21373190 is about 4623.1147509012. The cubic root of 21373190 is about 277.5171214715.

The spelling of 21373190 in words is "twenty-one million, three hundred seventy-three thousand, one hundred ninety".