20100436 has 24 divisors (see below), whose sum is σ = 37566144. Its totient is φ = 9387840.

The previous prime is 20100433. The next prime is 20100439. The reversal of 20100436 is 63400102.

It is an interprime number because it is at equal distance from previous prime (20100433) and next prime (20100439).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100433) 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, 1416 + ... + 6496.

It is an arithmetic number, because the mean of its divisors is an integer number (1565256).

Almost surely, 2^20100436 is an apocalyptic number.

It is an amenable number.

20100436 is a deficient number, since it is larger than the sum of its proper divisors (17465708).

20100436 is a wasteful number, since it uses less digits than its factorization.

20100436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151 (or 5149 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20100436 is about 4483.3509788996. The cubic root of 20100436 is about 271.8953785931.

Adding to 20100436 its reverse (63400102), we get a palindrome (83500538).

The spelling of 20100436 in words is "twenty million, one hundred thousand, four hundred thirty-six".