11905020 has 108 divisors (see below), whose sum is σ = 38667720. Its totient is φ = 2956608.

The previous prime is 11905013. The next prime is 11905021. The reversal of 11905020 is 2050911.

11905020 = T₃₅ + T₃₆ + ... + T₄₁₄.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11904984 and 11905002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11905021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 201751 + ... + 201809.

Almost surely, 2^11905020 is an apocalyptic number.

11905020 is a gapful number since it is divisible by the number (10) 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 11905020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19333860).

11905020 is an abundant number, since it is smaller than the sum of its proper divisors (26762700).

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

11905020 is a wasteful number, since it uses less digits than its factorization.

11905020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 11905020 is about 3450.3651980624. The cubic root of 11905020 is about 228.3372202913.

Adding to 11905020 its reverse (2050911), we get a palindrome (13955931).

The spelling of 11905020 in words is "eleven million, nine hundred five thousand, twenty".