20643060434 has 16 divisors (see below), whose sum is σ = 31222588320. Its totient is φ = 10235640480.

The previous prime is 20643060419. The next prime is 20643060467. The reversal of 20643060434 is 43406034602.

It is a super-2 number, since 2×20643060434² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20643060434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361982 + ... + 415110.

It is an arithmetic number, because the mean of its divisors is an integer number (1951411770).

Almost surely, 2^20643060434 is an apocalyptic number.

20643060434 is a deficient number, since it is larger than the sum of its proper divisors (10579527886).

20643060434 is a wasteful number, since it uses less digits than its factorization.

20643060434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54745.

The product of its (nonzero) digits is 41472, while the sum is 32.

The spelling of 20643060434 in words is "twenty billion, six hundred forty-three million, sixty thousand, four hundred thirty-four".