20575453669 has 4 divisors (see below), whose sum is σ = 20657427840. Its totient is φ = 20493479500.

The previous prime is 20575453627. The next prime is 20575453673. The reversal of 20575453669 is 96635457502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20575453669 - 2²⁹ = 20038582757 is a prime.

It is a super-2 number, since 2×20575453669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20575453069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40986709 + ... + 40987210.

It is an arithmetic number, because the mean of its divisors is an integer number (5164356960).

Almost surely, 2^20575453669 is an apocalyptic number.

It is an amenable number.

20575453669 is a deficient number, since it is larger than the sum of its proper divisors (81974171).

20575453669 is an equidigital number, since it uses as much as digits as its factorization.

20575453669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81974170.

The product of its (nonzero) digits is 6804000, while the sum is 52.

The spelling of 20575453669 in words is "twenty billion, five hundred seventy-five million, four hundred fifty-three thousand, six hundred sixty-nine".