21160996 has 12 divisors (see below), whose sum is σ = 37448460. Its totient is φ = 10461440.

The previous prime is 21160973. The next prime is 21161017. The reversal of 21160996 is 69906112.

It can be written as a sum of positive squares in 2 ways, for example, as 2842596 + 18318400 = 1686^2 + 4280^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29365 + ... + 30076.

It is an arithmetic number, because the mean of its divisors is an integer number (3120705).

Almost surely, 2^21160996 is an apocalyptic number.

It is an amenable number.

21160996 is a deficient number, since it is larger than the sum of its proper divisors (16287464).

21160996 is a wasteful number, since it uses less digits than its factorization.

21160996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59534 (or 59532 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 21160996 is about 4600.1082595956. The cubic root of 21160996 is about 276.5956644302.

The spelling of 21160996 in words is "twenty-one million, one hundred sixty thousand, nine hundred ninety-six".