20604721503 has 16 divisors (see below), whose sum is σ = 28164884832. Its totient is φ = 13391040000.

The previous prime is 20604721481. The next prime is 20604721549. The reversal of 20604721503 is 30512740602.

It is not a de Polignac number, because 20604721503 - 2⁵ = 20604721471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20604721103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95643 + ... + 224403.

It is an arithmetic number, because the mean of its divisors is an integer number (1760305302).

Almost surely, 2^20604721503 is an apocalyptic number.

20604721503 is a deficient number, since it is larger than the sum of its proper divisors (7560163329).

20604721503 is a wasteful number, since it uses less digits than its factorization.

20604721503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130106.

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 20604721503 in words is "twenty billion, six hundred four million, seven hundred twenty-one thousand, five hundred three".