20502002145 has 8 divisors (see below), whose sum is σ = 32803203456. Its totient is φ = 10934401136.

The previous prime is 20502002141. The next prime is 20502002173. The reversal of 20502002145 is 54120020502.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20502002145 - 2² = 20502002141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20502002141) 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, 683400057 + ... + 683400086.

It is an arithmetic number, because the mean of its divisors is an integer number (4100400432).

Almost surely, 2^20502002145 is an apocalyptic number.

It is an amenable number.

20502002145 is a deficient number, since it is larger than the sum of its proper divisors (12301201311).

20502002145 is a wasteful number, since it uses less digits than its factorization.

20502002145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366800151.

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 20502002145 its reverse (54120020502), we get a palindrome (74622022647).

The spelling of 20502002145 in words is "twenty billion, five hundred two million, two thousand, one hundred forty-five".