11801900 has 36 divisors (see below), whose sum is σ = 27940920. Its totient is φ = 4291200.

The previous prime is 11801899. The next prime is 11801939. The reversal of 11801900 is 910811.

11801900 is nontrivially palindromic in base 9.

It is a super-2 number, since 2×11801900² = 278569687220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4265 + ... + 6464.

Almost surely, 2^11801900 is an apocalyptic number.

11801900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11801900 is an abundant number, since it is smaller than the sum of its proper divisors (16139020).

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

11801900 is a wasteful number, since it uses less digits than its factorization.

11801900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10754 (or 10747 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 11801900 is about 3435.3893520240. The cubic root of 11801900 is about 227.6760300846.

11801900 divided by its sum of digits (20) gives a palindrome (590095).

It can be divided in two parts, 11 and 801900, that multiplied together give a square (8820900 = 2970²).

The spelling of 11801900 in words is "eleven million, eight hundred one thousand, nine hundred".