20013100 has 18 divisors (see below), whose sum is σ = 43428644. Its totient is φ = 8005200.

The previous prime is 20013083. The next prime is 20013107. The reversal of 20013100 is 131002.

It is a super-2 number, since 2×20013100² = 801048343220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20013107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99966 + ... + 100165.

Almost surely, 2^20013100 is an apocalyptic number.

20013100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013100 is an abundant number, since it is smaller than the sum of its proper divisors (23415544).

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

20013100 is a wasteful number, since it uses less digits than its factorization.

20013100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200145 (or 200138 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 20013100 is about 4473.6003397711. The cubic root of 20013100 is about 271.5010135093.

Adding to 20013100 its reverse (131002), we get a palindrome (20144102).

The spelling of 20013100 in words is "twenty million, thirteen thousand, one hundred".