20678175553 has 16 divisors (see below), whose sum is σ = 24729613056. Its totient is φ = 16905461760.

The previous prime is 20678175541. The next prime is 20678175563. The reversal of 20678175553 is 35557187602.

It is a cyclic number.

It is not a de Polignac number, because 20678175553 - 2¹⁷ = 20678044481 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20678175497 and 20678175506.

It is not an unprimeable number, because it can be changed into a prime (20678175563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125088 + ... + 238753.

It is an arithmetic number, because the mean of its divisors is an integer number (1545600816).

Almost surely, 2^20678175553 is an apocalyptic number.

20678175553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20678175553 is a deficient number, since it is larger than the sum of its proper divisors (4051437503).

20678175553 is a wasteful number, since it uses less digits than its factorization.

20678175553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364224.

The product of its (nonzero) digits is 1764000, while the sum is 49.

The spelling of 20678175553 in words is "twenty billion, six hundred seventy-eight million, one hundred seventy-five thousand, five hundred fifty-three".