20691214 has 16 divisors (see below), whose sum is σ = 33264288. Its totient is φ = 9627552.

The previous prime is 20691197. The next prime is 20691217. The reversal of 20691214 is 41219602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20691217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4377 + ... + 7780.

It is an arithmetic number, because the mean of its divisors is an integer number (2079018).

Almost surely, 2^20691214 is an apocalyptic number.

20691214 is a deficient number, since it is larger than the sum of its proper divisors (12573074).

20691214 is a wasteful number, since it uses less digits than its factorization.

20691214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12219.

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

The square root of 20691214 is about 4548.7596111468. The cubic root of 20691214 is about 274.5334856291.

The spelling of 20691214 in words is "twenty million, six hundred ninety-one thousand, two hundred fourteen".