20662659669 has 16 divisors (see below), whose sum is σ = 28226689344. Its totient is φ = 13436976000.

The previous prime is 20662659623. The next prime is 20662659671. The reversal of 20662659669 is 96695626602.

It is not a de Polignac number, because 20662659669 - 2⁷ = 20662659541 is a prime.

It is a super-2 number, since 2×20662659669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20662659169) 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 15 ways as a sum of consecutive naturals, for example, 1203147 + ... + 1220199.

It is an arithmetic number, because the mean of its divisors is an integer number (1764168084).

Almost surely, 2^20662659669 is an apocalyptic number.

It is an amenable number.

20662659669 is a deficient number, since it is larger than the sum of its proper divisors (7564029675).

20662659669 is a wasteful number, since it uses less digits than its factorization.

20662659669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26948.

The product of its (nonzero) digits is 12597120, while the sum is 57.

The spelling of 20662659669 in words is "twenty billion, six hundred sixty-two million, six hundred fifty-nine thousand, six hundred sixty-nine".