20009975553 has 24 divisors (see below), whose sum is σ = 29906997120. Its totient is φ = 12876954720.

The previous prime is 20009975543. The next prime is 20009975581. The reversal of 20009975553 is 35557990002.

20009975553 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 9 + 97 + 5 + 553 = 666.

It is not a de Polignac number, because 20009975553 - 2⁴ = 20009975537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20009975499 and 20009975508.

It is not an unprimeable number, because it can be changed into a prime (20009975543) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1785658 + ... + 1796828.

It is an arithmetic number, because the mean of its divisors is an integer number (1246124880).

Almost surely, 2^20009975553 is an apocalyptic number.

It is an amenable number.

20009975553 is a deficient number, since it is larger than the sum of its proper divisors (9897021567).

20009975553 is a wasteful number, since it uses less digits than its factorization.

20009975553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18069 (or 18066 counting only the distinct ones).

The product of its (nonzero) digits is 425250, while the sum is 45.

The spelling of 20009975553 in words is "twenty billion, nine million, nine hundred seventy-five thousand, five hundred fifty-three".