20189650 has 48 divisors (see below), whose sum is σ = 41013000. Its totient is φ = 7349760.

The previous prime is 20189641. The next prime is 20189651. The reversal of 20189650 is 5698102.

It can be written as a sum of positive squares in 12 ways, for example, as 2601 + 20187049 = 51^2 + 4493^2 .

It is not an unprimeable number, because it can be changed into a prime (20189651) 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, 57676 + ... + 58024.

Almost surely, 2^20189650 is an apocalyptic number.

20189650 is an abundant number, since it is smaller than the sum of its proper divisors (20823350).

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

20189650 is a wasteful number, since it uses less digits than its factorization.

20189650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 20189650 is about 4493.2894409330. The cubic root of 20189650 is about 272.2970460861.

The spelling of 20189650 in words is "twenty million, one hundred eighty-nine thousand, six hundred fifty".