21375026 has 8 divisors (see below), whose sum is σ = 32087664. Its totient is φ = 10679140.

The previous prime is 21375023. The next prime is 21375031. The reversal of 21375026 is 62057312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21374986 and 21375004.

It is not an unprimeable number, because it can be changed into a prime (21375023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260 + ... + 6543.

It is an arithmetic number, because the mean of its divisors is an integer number (4010958).

Almost surely, 2^21375026 is an apocalyptic number.

21375026 is a deficient number, since it is larger than the sum of its proper divisors (10712638).

21375026 is a wasteful number, since it uses less digits than its factorization.

21375026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8376.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 21375026 is about 4623.3133140638. The cubic root of 21375026 is about 277.5250676703.

The spelling of 21375026 in words is "twenty-one million, three hundred seventy-five thousand, twenty-six".