20015004553 has 8 divisors (see below), whose sum is σ = 21765124872. Its totient is φ = 18328525056.

The previous prime is 20015004551. The next prime is 20015004619. The reversal of 20015004553 is 35540051002.

It can be written as a sum of positive squares in 4 ways, for example, as 10013404489 + 10001600064 = 100067^2 + 100008^2 .

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 20015004553 - 2¹ = 20015004551 is a prime.

It is a super-2 number, since 2×20015004553² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20015004551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15909550 + ... + 15910807.

It is an arithmetic number, because the mean of its divisors is an integer number (2720640609).

Almost surely, 2^20015004553 is an apocalyptic number.

It is an amenable number.

20015004553 is a deficient number, since it is larger than the sum of its proper divisors (1750120319).

20015004553 is a wasteful number, since it uses less digits than its factorization.

20015004553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31820411.

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 20015004553 its reverse (35540051002), we get a palindrome (55555055555).

The spelling of 20015004553 in words is "twenty billion, fifteen million, four thousand, five hundred fifty-three".