20950090 has 16 divisors (see below), whose sum is σ = 43097472. Its totient is φ = 7182864.

The previous prime is 20950081. The next prime is 20950091. The reversal of 20950090 is 9005902.

It is not an unprimeable number, because it can be changed into a prime (20950091) 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, 149574 + ... + 149713.

It is an arithmetic number, because the mean of its divisors is an integer number (2693592).

Almost surely, 2^20950090 is an apocalyptic number.

20950090 is an abundant number, since it is smaller than the sum of its proper divisors (22147382).

20950090 is a wasteful number, since it uses less digits than its factorization.

20950090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299301.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 20950090 is about 4577.1268280440. The cubic root of 20950090 is about 275.6736761504.

Adding to 20950090 its reverse (9005902), we get a palindrome (29955992).

The spelling of 20950090 in words is "twenty million, nine hundred fifty thousand, ninety".