21162010 has 32 divisors (see below), whose sum is σ = 40458240. Its totient is φ = 7947072.

The previous prime is 21162007. The next prime is 21162013. The reversal of 21162010 is 1026112.

21162010 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (21162007) and next prime (21162013).

It is not an unprimeable number, because it can be changed into a prime (21162013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23692 + ... + 24568.

It is an arithmetic number, because the mean of its divisors is an integer number (1264320).

Almost surely, 2^21162010 is an apocalyptic number.

21162010 is a deficient number, since it is larger than the sum of its proper divisors (19296230).

21162010 is a wasteful number, since it uses less digits than its factorization.

21162010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 21162010 is about 4600.2184730728. The cubic root of 21162010 is about 276.6000823622.

Adding to 21162010 its reverse (1026112), we get a palindrome (22188122).

The spelling of 21162010 in words is "twenty-one million, one hundred sixty-two thousand, ten".