20467457 has 8 divisors (see below), whose sum is σ = 20726184. Its totient is φ = 20210688.

The previous prime is 20467429. The next prime is 20467459. The reversal of 20467457 is 75476402.

It can be written as a sum of positive squares in 4 ways, for example, as 361201 + 20106256 = 601^2 + 4484^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20467457 - 2¹⁴ = 20451073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20467459) 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, 33083 + ... + 33695.

It is an arithmetic number, because the mean of its divisors is an integer number (2590773).

Almost surely, 2^20467457 is an apocalyptic number.

It is an amenable number.

20467457 is a deficient number, since it is larger than the sum of its proper divisors (258727).

20467457 is a wasteful number, since it uses less digits than its factorization.

20467457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 20467457 is about 4524.0973685366. The cubic root of 20467457 is about 273.5402853004.

The spelling of 20467457 in words is "twenty million, four hundred sixty-seven thousand, four hundred fifty-seven".