20620642603 has 16 divisors (see below), whose sum is σ = 22902289920. Its totient is φ = 18407552800.

The previous prime is 20620642577. The next prime is 20620642607. The reversal of 20620642603 is 30624602602.

It is a cyclic number.

It is not a de Polignac number, because 20620642603 - 2¹⁷ = 20620511531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20620642607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573801 + ... + 608677.

It is an arithmetic number, because the mean of its divisors is an integer number (1431393120).

Almost surely, 2^20620642603 is an apocalyptic number.

20620642603 is a deficient number, since it is larger than the sum of its proper divisors (2281647317).

20620642603 is a wasteful number, since it uses less digits than its factorization.

20620642603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35858.

The product of its (nonzero) digits is 20736, while the sum is 31.

The spelling of 20620642603 in words is "twenty billion, six hundred twenty million, six hundred forty-two thousand, six hundred three".