20552166993 has 4 divisors (see below), whose sum is σ = 27402889328. Its totient is φ = 13701444660.

The previous prime is 20552166923. The next prime is 20552167021. The reversal of 20552166993 is 39966125502.

It is a happy number.

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 not a de Polignac number, because 20552166993 - 2²⁵ = 20518612561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20552166913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3425361163 + ... + 3425361168.

It is an arithmetic number, because the mean of its divisors is an integer number (6850722332).

Almost surely, 2^20552166993 is an apocalyptic number.

It is an amenable number.

20552166993 is a deficient number, since it is larger than the sum of its proper divisors (6850722335).

20552166993 is an equidigital number, since it uses as much as digits as its factorization.

20552166993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6850722334.

The product of its (nonzero) digits is 874800, while the sum is 48.

The spelling of 20552166993 in words is "twenty billion, five hundred fifty-two million, one hundred sixty-six thousand, nine hundred ninety-three".