20012747018 has 16 divisors (see below), whose sum is σ = 33303186720. Its totient is φ = 8942521200.

The previous prime is 20012747017. The next prime is 20012747047. The reversal of 20012747018 is 81074721002.

It is a happy number.

It is a Curzon number.

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, 7707773 + ... + 7710368.

It is an arithmetic number, because the mean of its divisors is an integer number (2081449170).

Almost surely, 2^20012747018 is an apocalyptic number.

20012747018 is a deficient number, since it is larger than the sum of its proper divisors (13290439702).

20012747018 is a wasteful number, since it uses less digits than its factorization.

20012747018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15418213.

The product of its (nonzero) digits is 6272, while the sum is 32.

The spelling of 20012747018 in words is "twenty billion, twelve million, seven hundred forty-seven thousand, eighteen".