10821634 has 4 divisors (see below), whose sum is σ = 16232454. Its totient is φ = 5410816.

The previous prime is 10821631. The next prime is 10821641. The reversal of 10821634 is 43612801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10465225 + 356409 = 3235^2 + 597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10821599 and 10821608.

It is not an unprimeable number, because it can be changed into a prime (10821631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2705407 + ... + 2705410.

Almost surely, 2^10821634 is an apocalyptic number.

10821634 is a deficient number, since it is larger than the sum of its proper divisors (5410820).

10821634 is an equidigital number, since it uses as much as digits as its factorization.

10821634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410819.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 10821634 is about 3289.6252066155. The cubic root of 10821634 is about 221.1893846951.

The spelling of 10821634 in words is "ten million, eight hundred twenty-one thousand, six hundred thirty-four".