20030890 has 16 divisors (see below), whose sum is σ = 39333600. Its totient is φ = 7283920.

The previous prime is 20030849. The next prime is 20030893. The reversal of 20030890 is 9803002.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20030893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90940 + ... + 91159.

It is an arithmetic number, because the mean of its divisors is an integer number (2458350).

Almost surely, 2^20030890 is an apocalyptic number.

20030890 is a deficient number, since it is larger than the sum of its proper divisors (19302710).

20030890 is a wasteful number, since it uses less digits than its factorization.

20030890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182117.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20030890 is about 4475.5882294956. The cubic root of 20030890 is about 271.5814370416.

Adding to 20030890 its reverse (9803002), we get a palindrome (29833892).

The spelling of 20030890 in words is "twenty million, thirty thousand, eight hundred ninety".