20577473 has 4 divisors (see below), whose sum is σ = 23517120. Its totient is φ = 17637828.

The previous prime is 20577461. The next prime is 20577481. The reversal of 20577473 is 37477502.

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.

It is a cyclic number.

It is not a de Polignac number, because 20577473 - 2¹⁶ = 20511937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20577373) 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, 1469813 + ... + 1469826.

It is an arithmetic number, because the mean of its divisors is an integer number (5879280).

Almost surely, 2^20577473 is an apocalyptic number.

It is an amenable number.

20577473 is a deficient number, since it is larger than the sum of its proper divisors (2939647).

20577473 is an equidigital number, since it uses as much as digits as its factorization.

20577473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939646.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 20577473 is about 4536.2399627886. The cubic root of 20577473 is about 274.0295180162.

The spelling of 20577473 in words is "twenty million, five hundred seventy-seven thousand, four hundred seventy-three".