20007473 has 6 divisors (see below), whose sum is σ = 20315106. Its totient is φ = 19704432.

The previous prime is 20007457. The next prime is 20007479. The reversal of 20007473 is 37470002.

It can be written as a sum of positive squares in only one way, i.e., 18386944 + 1620529 = 4288^2 + 1273^2 .

It is not a de Polignac number, because 20007473 - 2⁴ = 20007457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20007479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2261 + ... + 6717.

It is an arithmetic number, because the mean of its divisors is an integer number (3385851).

Almost surely, 2^20007473 is an apocalyptic number.

It is an amenable number.

20007473 is a deficient number, since it is larger than the sum of its proper divisors (307633).

20007473 is an frugal number, since it uses more digits than its factorization.

20007473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4591 (or 4524 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 20007473 is about 4472.9713837672. The cubic root of 20007473 is about 271.4755655210.

Adding to 20007473 its reverse (37470002), we get a palindrome (57477475).

The spelling of 20007473 in words is "twenty million, seven thousand, four hundred seventy-three".