20446777634 has 32 divisors (see below), whose sum is σ = 31688326656. Its totient is φ = 9889367040.

The previous prime is 20446777597. The next prime is 20446777639. The reversal of 20446777634 is 43677764402.

It is a happy number.

It is a super-2 number, since 2×20446777634² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20446777639) 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 15 ways as a sum of consecutive naturals, for example, 11879894 + ... + 11881614.

It is an arithmetic number, because the mean of its divisors is an integer number (990260208).

Almost surely, 2^20446777634 is an apocalyptic number.

20446777634 is a deficient number, since it is larger than the sum of its proper divisors (11241549022).

20446777634 is a wasteful number, since it uses less digits than its factorization.

20446777634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170.

The product of its (nonzero) digits is 4741632, while the sum is 50.

The spelling of 20446777634 in words is "twenty billion, four hundred forty-six million, seven hundred seventy-seven thousand, six hundred thirty-four".