20109650 has 24 divisors (see below), whose sum is σ = 40805424. Its totient is φ = 7312400.

The previous prime is 20109647. The next prime is 20109653. The reversal of 20109650 is 5690102.

It is an interprime number because it is at equal distance from previous prime (20109647) and next prime (20109653).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20109653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17732 + ... + 18831.

It is an arithmetic number, because the mean of its divisors is an integer number (1700226).

Almost surely, 2^20109650 is an apocalyptic number.

20109650 is an abundant number, since it is smaller than the sum of its proper divisors (20695774).

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

20109650 is a wasteful number, since it uses less digits than its factorization.

20109650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36586 (or 36581 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 20109650 is about 4484.3784407652. The cubic root of 20109650 is about 271.9369176807.

Adding to 20109650 its reverse (5690102), we get a palindrome (25799752).

The spelling of 20109650 in words is "twenty million, one hundred nine thousand, six hundred fifty".