20473957 has 4 divisors (see below), whose sum is σ = 23398816. Its totient is φ = 17549100.

The previous prime is 20473949. The next prime is 20473993. The reversal of 20473957 is 75937402.

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 20473957 - 2³ = 20473949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1462419 + ... + 1462432.

It is an arithmetic number, because the mean of its divisors is an integer number (5849704).

Almost surely, 2^20473957 is an apocalyptic number.

It is an amenable number.

20473957 is a deficient number, since it is larger than the sum of its proper divisors (2924859).

20473957 is an equidigital number, since it uses as much as digits as its factorization.

20473957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924858.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 20473957 is about 4524.8156868540. The cubic root of 20473957 is about 273.5692389652.

It can be divided in two parts, 2047395 and 7, that added together give a palindrome (2047402).

The spelling of 20473957 in words is "twenty million, four hundred seventy-three thousand, nine hundred fifty-seven".