20212616554 has 8 divisors (see below), whose sum is σ = 32651149860. Its totient is φ = 9328899936.

The previous prime is 20212616551. The next prime is 20212616579. The reversal of 20212616554 is 45561621202.

It can be written as a sum of positive squares in 2 ways, for example, as 14262808329 + 5949808225 = 119427^2 + 77135^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20212616551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388704139 + ... + 388704190.

Almost surely, 2^20212616554 is an apocalyptic number.

20212616554 is a deficient number, since it is larger than the sum of its proper divisors (12438533306).

20212616554 is a wasteful number, since it uses less digits than its factorization.

20212616554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777408344.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 20212616554 in words is "twenty billion, two hundred twelve million, six hundred sixteen thousand, five hundred fifty-four".