20553245555 has 8 divisors (see below), whose sum is σ = 24730019952. Its totient is φ = 16398512928.

The previous prime is 20553245521. The next prime is 20553245569. The reversal of 20553245555 is 55554235502.

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 20553245555 - 2⁸ = 20553245299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5508389 + ... + 5512118.

It is an arithmetic number, because the mean of its divisors is an integer number (3091252494).

Almost surely, 2^20553245555 is an apocalyptic number.

20553245555 is a deficient number, since it is larger than the sum of its proper divisors (4176774397).

20553245555 is a wasteful number, since it uses less digits than its factorization.

20553245555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11020885.

The product of its (nonzero) digits is 750000, while the sum is 41.

The spelling of 20553245555 in words is "twenty billion, five hundred fifty-three million, two hundred forty-five thousand, five hundred fifty-five".