20553266123 has 8 divisors (see below), whose sum is σ = 22732511088. Its totient is φ = 18459481824.

The previous prime is 20553266117. The next prime is 20553266147. The reversal of 20553266123 is 32166235502.

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 20553266123 - 2²² = 20549071819 is a prime.

It is a super-2 number, since 2×20553266123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20553266113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21364661 + ... + 21365622.

It is an arithmetic number, because the mean of its divisors is an integer number (2841563886).

Almost surely, 2^20553266123 is an apocalyptic number.

20553266123 is a deficient number, since it is larger than the sum of its proper divisors (2179244965).

20553266123 is a wasteful number, since it uses less digits than its factorization.

20553266123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42730333.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 20553266123 in words is "twenty billion, five hundred fifty-three million, two hundred sixty-six thousand, one hundred twenty-three".