10821900 has 36 divisors (see below), whose sum is σ = 31312232. Its totient is φ = 2885760.

The previous prime is 10821893. The next prime is 10821913. The reversal of 10821900 is 912801.

It is a super-2 number, since 2×10821900² = 234227039220000, which contains 22 as substring.

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, 17737 + ... + 18336.

Almost surely, 2^10821900 is an apocalyptic number.

10821900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10821900 is an abundant number, since it is smaller than the sum of its proper divisors (20490332).

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

10821900 is a wasteful number, since it uses less digits than its factorization.

10821900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36090 (or 36083 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 10821900 is about 3289.6656365047. The cubic root of 10821900 is about 221.1911969874.

Subtracting from 10821900 its reverse (912801), we obtain a palindrome (9909099).

The spelling of 10821900 in words is "ten million, eight hundred twenty-one thousand, nine hundred".