20507104 has 12 divisors (see below), whose sum is σ = 40373424. Its totient is φ = 10253536.

The previous prime is 20507051. The next prime is 20507107. The reversal of 20507104 is 40170502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20507107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320392 + ... + 320455.

It is an arithmetic number, because the mean of its divisors is an integer number (3364452).

Almost surely, 2^20507104 is an apocalyptic number.

It is an amenable number.

20507104 is a deficient number, since it is larger than the sum of its proper divisors (19866320).

20507104 is an equidigital number, since it uses as much as digits as its factorization.

20507104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640857 (or 640849 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 20507104 is about 4528.4770066767. The cubic root of 20507104 is about 273.7167940652.

Adding to 20507104 its reverse (40170502), we get a palindrome (60677606).

The spelling of 20507104 in words is "twenty million, five hundred seven thousand, one hundred four".