20961214 has 4 divisors (see below), whose sum is σ = 31441824. Its totient is φ = 10480606.

The previous prime is 20961181. The next prime is 20961251. The reversal of 20961214 is 41216902.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5240302 + ... + 5240305.

It is an arithmetic number, because the mean of its divisors is an integer number (7860456).

Almost surely, 2^20961214 is an apocalyptic number.

20961214 is a deficient number, since it is larger than the sum of its proper divisors (10480610).

20961214 is a wasteful number, since it uses less digits than its factorization.

20961214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10480609.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20961214 is about 4578.3418395747. The cubic root of 20961214 is about 275.7224595744.

The spelling of 20961214 in words is "twenty million, nine hundred sixty-one thousand, two hundred fourteen".