20694346 has 4 divisors (see below), whose sum is σ = 31041522. Its totient is φ = 10347172.

The previous prime is 20694343. The next prime is 20694347. The reversal of 20694346 is 64349602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64349602 = 2 ⋅32174801.

It can be written as a sum of positive squares in only one way, i.e., 20115225 + 579121 = 4485^2 + 761^2 .

It is not an unprimeable number, because it can be changed into a prime (20694343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5173585 + ... + 5173588.

Almost surely, 2^20694346 is an apocalyptic number.

20694346 is a deficient number, since it is larger than the sum of its proper divisors (10347176).

20694346 is a wasteful number, since it uses less digits than its factorization.

20694346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10347175.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 20694346 is about 4549.1038677964. The cubic root of 20694346 is about 274.5473368463.

The spelling of 20694346 in words is "twenty million, six hundred ninety-four thousand, three hundred forty-six".