21375796 has 36 divisors (see below), whose sum is σ = 41032992. Its totient is φ = 9738144.

The previous prime is 21375791. The next prime is 21375797. The reversal of 21375796 is 69757312.

21375796 = T₁₇₃ + T₁₇₄ + ... + T₅₁₀.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21375791) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 69475 + ... + 69781.

Almost surely, 2^21375796 is an apocalyptic number.

21375796 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21375796 is a deficient number, since it is larger than the sum of its proper divisors (19657196).

21375796 is a wasteful number, since it uses less digits than its factorization.

21375796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 425 counting only the distinct ones).

The product of its digits is 79380, while the sum is 40.

The square root of 21375796 is about 4623.3965869261. The cubic root of 21375796 is about 277.5284000910.

The spelling of 21375796 in words is "twenty-one million, three hundred seventy-five thousand, seven hundred ninety-six".