20215000554 has 32 divisors (see below), whose sum is σ = 47332688256. Its totient is φ = 5634842880.

The previous prime is 20215000453. The next prime is 20215000607. The reversal of 20215000554 is 45500051202.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5867907 + ... + 5871350.

It is an arithmetic number, because the mean of its divisors is an integer number (1479146508).

Almost surely, 2^20215000554 is an apocalyptic number.

20215000554 is an abundant number, since it is smaller than the sum of its proper divisors (27117687702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20215000554 is a wasteful number, since it uses less digits than its factorization.

20215000554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11739310.

The product of its (nonzero) digits is 2000, while the sum is 24.

Adding to 20215000554 its reverse (45500051202), we get a palindrome (65715051756).

The spelling of 20215000554 in words is "twenty billion, two hundred fifteen million, five hundred fifty-four", and thus it is an aban number.