20139736633 has 8 divisors (see below), whose sum is σ = 21040492680. Its totient is φ = 19252732800.

The previous prime is 20139736627. The next prime is 20139736651. The reversal of 20139736633 is 33663793102.

It can be written as a sum of positive squares in 4 ways, for example, as 12966832384 + 7172904249 = 113872^2 + 84693^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20139736633 - 2⁹ = 20139736121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20139736633.

It is not an unprimeable number, because it can be changed into a prime (20139736663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3435060 + ... + 3440917.

It is an arithmetic number, because the mean of its divisors is an integer number (2630061585).

Almost surely, 2^20139736633 is an apocalyptic number.

It is an amenable number.

20139736633 is a deficient number, since it is larger than the sum of its proper divisors (900756047).

20139736633 is a wasteful number, since it uses less digits than its factorization.

20139736633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876107.

The product of its (nonzero) digits is 367416, while the sum is 43.

The spelling of 20139736633 in words is "twenty billion, one hundred thirty-nine million, seven hundred thirty-six thousand, six hundred thirty-three".