20921035 has 16 divisors (see below), whose sum is σ = 26164800. Its totient is φ = 16039296.

The previous prime is 20921027. The next prime is 20921041. The reversal of 20921035 is 53012902.

It is a cyclic number.

It is not a de Polignac number, because 20921035 - 2³ = 20921027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20920997 and 20921015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22306 + ... + 23224.

It is an arithmetic number, because the mean of its divisors is an integer number (1635300).

Almost surely, 2^20921035 is an apocalyptic number.

20921035 is a deficient number, since it is larger than the sum of its proper divisors (5243765).

20921035 is a wasteful number, since it uses less digits than its factorization.

20921035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20921035 is about 4573.9517924875. The cubic root of 20921035 is about 275.5461762317.

Adding to 20921035 its reverse (53012902), we get a palindrome (73933937).

The spelling of 20921035 in words is "twenty million, nine hundred twenty-one thousand, thirty-five".