20430694 has 4 divisors (see below), whose sum is σ = 30646044. Its totient is φ = 10215346.

The previous prime is 20430691. The next prime is 20430713. The reversal of 20430694 is 49603402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49603402 = 2 ⋅24801701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5107672 + ... + 5107675.

It is an arithmetic number, because the mean of its divisors is an integer number (7661511).

Almost surely, 2^20430694 is an apocalyptic number.

20430694 is a deficient number, since it is larger than the sum of its proper divisors (10215350).

20430694 is a wasteful number, since it uses less digits than its factorization.

20430694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10215349.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20430694 is about 4520.0325220069. The cubic root of 20430694 is about 273.3764123390.

The spelling of 20430694 in words is "twenty million, four hundred thirty thousand, six hundred ninety-four".