21026485 has 8 divisors (see below), whose sum is σ = 26328960. Its totient is φ = 16089744.

The previous prime is 21026477. The next prime is 21026497. The reversal of 21026485 is 58462012.

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

It is a cyclic number.

It is not a de Polignac number, because 21026485 - 2³ = 21026477 is a prime.

It is a super-2 number, since 2×21026485² = 884226142910450, 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, 91305 + ... + 91534.

It is an arithmetic number, because the mean of its divisors is an integer number (3291120).

Almost surely, 2^21026485 is an apocalyptic number.

It is an amenable number.

21026485 is a deficient number, since it is larger than the sum of its proper divisors (5302475).

21026485 is a wasteful number, since it uses less digits than its factorization.

21026485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182867.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 21026485 is about 4585.4645348100. The cubic root of 21026485 is about 276.0083532093.

Adding to 21026485 its reverse (58462012), we get a palindrome (79488497).

The spelling of 21026485 in words is "twenty-one million, twenty-six thousand, four hundred eighty-five".