20646135422 has 32 divisors (see below), whose sum is σ = 33981587424. Its totient is φ = 9330048000.

The previous prime is 20646135409. The next prime is 20646135487. The reversal of 20646135422 is 22453164602.

It is a congruent number.

It is an unprimeable number.

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, 2757548 + ... + 2765024.

It is an arithmetic number, because the mean of its divisors is an integer number (1061924607).

Almost surely, 2^20646135422 is an apocalyptic number.

20646135422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20646135422 is a deficient number, since it is larger than the sum of its proper divisors (13335452002).

20646135422 is a wasteful number, since it uses less digits than its factorization.

20646135422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8204.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 20646135422 in words is "twenty billion, six hundred forty-six million, one hundred thirty-five thousand, four hundred twenty-two".