20503624655 has 4 divisors (see below), whose sum is σ = 24604349592. Its totient is φ = 16402899720.

The previous prime is 20503624633. The next prime is 20503624667. The reversal of 20503624655 is 55642630502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20503624655 - 2⁶ = 20503624591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2050362461 + ... + 2050362470.

It is an arithmetic number, because the mean of its divisors is an integer number (6151087398).

Almost surely, 2^20503624655 is an apocalyptic number.

20503624655 is a deficient number, since it is larger than the sum of its proper divisors (4100724937).

20503624655 is an equidigital number, since it uses as much as digits as its factorization.

20503624655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100724936.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 20503624655 in words is "twenty billion, five hundred three million, six hundred twenty-four thousand, six hundred fifty-five".