20540470 has 8 divisors (see below), whose sum is σ = 36972864. Its totient is φ = 8216184.

The previous prime is 20540461. The next prime is 20540477. The reversal of 20540470 is 7404502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1027014 + ... + 1027033.

It is an arithmetic number, because the mean of its divisors is an integer number (4621608).

Almost surely, 2^20540470 is an apocalyptic number.

20540470 is a deficient number, since it is larger than the sum of its proper divisors (16432394).

20540470 is a wasteful number, since it uses less digits than its factorization.

20540470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054054.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 20540470 is about 4532.1595294076. The cubic root of 20540470 is about 273.8651635577.

Adding to 20540470 its reverse (7404502), we get a palindrome (27944972).

The spelling of 20540470 in words is "twenty million, five hundred forty thousand, four hundred seventy".