20006665534 has 32 divisors (see below), whose sum is σ = 30689902080. Its totient is φ = 9778800000.

The previous prime is 20006665531. The next prime is 20006665537. The reversal of 20006665534 is 43556660002.

It is an interprime number because it is at equal distance from previous prime (20006665531) and next prime (20006665537).

It is a junction number, because it is equal to n+sod(n) for n = 20006665493 and 20006665502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20006665531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26639659 + ... + 26640409.

It is an arithmetic number, because the mean of its divisors is an integer number (959059440).

Almost surely, 2^20006665534 is an apocalyptic number.

20006665534 is a deficient number, since it is larger than the sum of its proper divisors (10683236546).

20006665534 is a wasteful number, since it uses less digits than its factorization.

20006665534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 20006665534 in words is "twenty billion, six million, six hundred sixty-five thousand, five hundred thirty-four".