20512473 has 8 divisors (see below), whose sum is σ = 27459936. Its totient is φ = 13620000.

The previous prime is 20512469. The next prime is 20512487. The reversal of 20512473 is 37421502.

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

It is not a de Polignac number, because 20512473 - 2² = 20512469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20512403) 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, 12868 + ... + 14373.

It is an arithmetic number, because the mean of its divisors is an integer number (3432492).

Almost surely, 2^20512473 is an apocalyptic number.

It is an amenable number.

20512473 is a deficient number, since it is larger than the sum of its proper divisors (6947463).

20512473 is a wasteful number, since it uses less digits than its factorization.

20512473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27495.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20512473 is about 4529.0697720393. The cubic root of 20512473 is about 273.7406794016.

Adding to 20512473 its reverse (37421502), we get a palindrome (57933975).

The spelling of 20512473 in words is "twenty million, five hundred twelve thousand, four hundred seventy-three".