20811035554 has 8 divisors (see below), whose sum is σ = 33052821228. Its totient is φ = 9793428480.

The previous prime is 20811035527. The next prime is 20811035569. The reversal of 20811035554 is 45553011802.

It can be written as a sum of positive squares in 2 ways, for example, as 20042914329 + 768121225 = 141573^2 + 27715^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 612089281 = 20811035554 / (2 + 0 + 8 + 1 + 1 + 0 + 3 + 5 + 5 + 5 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306044607 + ... + 306044674.

Almost surely, 2^20811035554 is an apocalyptic number.

20811035554 is a deficient number, since it is larger than the sum of its proper divisors (12241785674).

20811035554 is a wasteful number, since it uses less digits than its factorization.

20811035554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612089300.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 20811035554 in words is "twenty billion, eight hundred eleven million, thirty-five thousand, five hundred fifty-four".