20694866 has 8 divisors (see below), whose sum is σ = 31085580. Its totient is φ = 10333008.

The previous prime is 20694847. The next prime is 20694881. The reversal of 20694866 is 66849602.

It can be written as a sum of positive squares in 2 ways, for example, as 19936225 + 758641 = 4465^2 + 871^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 5321 + ... + 8348.

Almost surely, 2^20694866 is an apocalyptic number.

20694866 is a deficient number, since it is larger than the sum of its proper divisors (10390714).

20694866 is a wasteful number, since it uses less digits than its factorization.

20694866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14428.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 20694866 is about 4549.1610215511. The cubic root of 20694866 is about 274.5496364023.

The spelling of 20694866 in words is "twenty million, six hundred ninety-four thousand, eight hundred sixty-six".