20012747019 has 8 divisors (see below), whose sum is σ = 26684662272. Its totient is φ = 13341331560.

The previous prime is 20012747017. The next prime is 20012747047. The reversal of 20012747019 is 91074721002.

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

It is not a de Polignac number, because 20012747019 - 2¹ = 20012747017 is a prime.

It is a super-2 number, since 2×20012747019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20012747011) 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, 18579 + ... + 200924.

It is an arithmetic number, because the mean of its divisors is an integer number (3335582784).

Almost surely, 2^20012747019 is an apocalyptic number.

20012747019 is a deficient number, since it is larger than the sum of its proper divisors (6671915253).

20012747019 is a wasteful number, since it uses less digits than its factorization.

20012747019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249897.

The product of its (nonzero) digits is 7056, while the sum is 33.

The spelling of 20012747019 in words is "twenty billion, twelve million, seven hundred forty-seven thousand, nineteen".