21912026 has 8 divisors (see below), whose sum is σ = 33632544. Its totient is φ = 10701180.

The previous prime is 21912017. The next prime is 21912047. The reversal of 21912026 is 62021912.

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 = 21911992 and 21912010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127310 + ... + 127481.

It is an arithmetic number, because the mean of its divisors is an integer number (4204068).

Almost surely, 2^21912026 is an apocalyptic number.

21912026 is a deficient number, since it is larger than the sum of its proper divisors (11720518).

21912026 is a wasteful number, since it uses less digits than its factorization.

21912026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254836.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 21912026 is about 4681.0283058320. The cubic root of 21912026 is about 279.8299392499.

Adding to 21912026 its reverse (62021912), we get a palindrome (83933938).

The spelling of 21912026 in words is "twenty-one million, nine hundred twelve thousand, twenty-six".