20603202621 has 8 divisors (see below), whose sum is σ = 28109796000. Its totient is φ = 13416038832.

The previous prime is 20603202619. The next prime is 20603202643. The reversal of 20603202621 is 12620230602.

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

It is not a de Polignac number, because 20603202621 - 2¹ = 20603202619 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20603202591 and 20603202600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20603206621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79857246 + ... + 79857503.

It is an arithmetic number, because the mean of its divisors is an integer number (3513724500).

Almost surely, 2^20603202621 is an apocalyptic number.

It is an amenable number.

20603202621 is a deficient number, since it is larger than the sum of its proper divisors (7506593379).

20603202621 is a wasteful number, since it uses less digits than its factorization.

20603202621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159714795.

The product of its (nonzero) digits is 1728, while the sum is 24.

The spelling of 20603202621 in words is "twenty billion, six hundred three million, two hundred two thousand, six hundred twenty-one".