20897030 has 48 divisors (see below), whose sum is σ = 47745936. Its totient is φ = 6511680.

The previous prime is 20897027. The next prime is 20897039. The reversal of 20897030 is 3079802.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20896984 and 20897002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20897039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3452 + ... + 7328.

It is an arithmetic number, because the mean of its divisors is an integer number (994707).

Almost surely, 2^20897030 is an apocalyptic number.

20897030 is an abundant number, since it is smaller than the sum of its proper divisors (26848906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20897030 is a wasteful number, since it uses less digits than its factorization.

20897030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3909 (or 3902 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20897030 is about 4571.3269408346. The cubic root of 20897030 is about 275.4407477732.

It can be divided in two parts, 2089 and 7030, that added together give a palindrome (9119).

The spelling of 20897030 in words is "twenty million, eight hundred ninety-seven thousand, thirty".