20010900 has 144 divisors (see below), whose sum is σ = 71356544. Its totient is φ = 4216320.

The previous prime is 20010889. The next prime is 20010917. The reversal of 20010900 is 901002.

It is a happy number.

It is a super-2 number, since 2×20010900² = 800872237620000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26934 + ... + 27666.

Almost surely, 2^20010900 is an apocalyptic number.

20010900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20010900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35678272).

20010900 is an abundant number, since it is smaller than the sum of its proper divisors (51345644).

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

20010900 is a wasteful number, since it uses less digits than its factorization.

20010900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 20010900 is about 4473.3544460505. The cubic root of 20010900 is about 271.4910646239.

Adding to 20010900 its reverse (901002), we get a palindrome (20911902).

It can be divided in two parts, 20010 and 900, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20010900 in words is "twenty million, ten thousand, nine hundred".