20679573 has 8 divisors (see below), whose sum is σ = 28462336. Its totient is φ = 13341600.

The previous prime is 20679563. The next prime is 20679583. The reversal of 20679573 is 37597602.

It is an interprime number because it is at equal distance from previous prime (20679563) and next prime (20679583).

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

It is not a de Polignac number, because 20679573 - 2⁵ = 20679541 is a prime.

It is a super-3 number, since 3×20679573³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679563) 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, 111088 + ... + 111273.

It is an arithmetic number, because the mean of its divisors is an integer number (3557792).

Almost surely, 2^20679573 is an apocalyptic number.

It is an amenable number.

20679573 is a deficient number, since it is larger than the sum of its proper divisors (7782763).

20679573 is a wasteful number, since it uses less digits than its factorization.

20679573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222395.

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 20679573 is about 4547.4798515222. The cubic root of 20679573 is about 274.4819912472.

The spelling of 20679573 in words is "twenty million, six hundred seventy-nine thousand, five hundred seventy-three".