20164633444 has 6 divisors (see below), whose sum is σ = 35288108534. Its totient is φ = 10082316720.

The previous prime is 20164633399. The next prime is 20164633459. The reversal of 20164633444 is 44433646102.

It can be written as a sum of positive squares in only one way, i.e., 19407833344 + 756800100 = 139312^2 + 27510^2 .

It is a super-2 number, since 2×20164633444² (a number of 21 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 2520579177 + ... + 2520579184.

Almost surely, 2^20164633444 is an apocalyptic number.

It is an amenable number.

20164633444 is a deficient number, since it is larger than the sum of its proper divisors (15123475090).

20164633444 is a wasteful number, since it uses less digits than its factorization.

20164633444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041158365 (or 5041158363 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 37.

The spelling of 20164633444 in words is "twenty billion, one hundred sixty-four million, six hundred thirty-three thousand, four hundred forty-four".