20612749538 has 8 divisors (see below), whose sum is σ = 30968126400. Its totient is φ = 10290040740.

The previous prime is 20612749537. The next prime is 20612749541. The reversal of 20612749538 is 83594721602.

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

It is a junction number, because it is equal to n+sod(n) for n = 20612749492 and 20612749501.

It is not an unprimeable number, because it can be changed into a prime (20612749537) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8165438 + ... + 8167961.

It is an arithmetic number, because the mean of its divisors is an integer number (3871015800).

It is a 1-persistent number, because it is pandigital, but 2⋅20612749538 = 41225499076 is not.

Almost surely, 2^20612749538 is an apocalyptic number.

20612749538 is a deficient number, since it is larger than the sum of its proper divisors (10355376862).

20612749538 is a wasteful number, since it uses less digits than its factorization.

20612749538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16334032.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 20612749538 in words is "twenty billion, six hundred twelve million, seven hundred forty-nine thousand, five hundred thirty-eight".