20479073 has 4 divisors (see below), whose sum is σ = 20614848. Its totient is φ = 20343300.

The previous prime is 20479061. The next prime is 20479087. The reversal of 20479073 is 37097402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37097402 = 2 ⋅18548701.

It is a cyclic number.

It is not a de Polignac number, because 20479073 - 2⁴ = 20479057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20439073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67661 + ... + 67962.

It is an arithmetic number, because the mean of its divisors is an integer number (5153712).

Almost surely, 2^20479073 is an apocalyptic number.

It is an amenable number.

20479073 is a deficient number, since it is larger than the sum of its proper divisors (135775).

20479073 is a wasteful number, since it uses less digits than its factorization.

20479073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135774.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 20479073 is about 4525.3809784371. The cubic root of 20479073 is about 273.5920234172.

The spelling of 20479073 in words is "twenty million, four hundred seventy-nine thousand, seventy-three".