20020503501 has 24 divisors (see below), whose sum is σ = 29169762336. Its totient is φ = 13231252320.

The previous prime is 20020503491. The next prime is 20020503523. The reversal of 20020503501 is 10530502002.

It is a happy number.

It is not a de Polignac number, because 20020503501 - 2¹³ = 20020495309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020503551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1185946 + ... + 1202708.

It is an arithmetic number, because the mean of its divisors is an integer number (1215406764).

Almost surely, 2^20020503501 is an apocalyptic number.

It is an amenable number.

20020503501 is a deficient number, since it is larger than the sum of its proper divisors (9149258835).

20020503501 is a wasteful number, since it uses less digits than its factorization.

20020503501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17913 (or 17910 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The spelling of 20020503501 in words is "twenty billion, twenty million, five hundred three thousand, five hundred one".