20485192018 has 16 divisors (see below), whose sum is σ = 30819161880. Its totient is φ = 10212160000.

The previous prime is 20485191971. The next prime is 20485192027. The reversal of 20485192018 is 81029158402.

It can be written as a sum of positive squares in 4 ways, for example, as 6722852049 + 13762339969 = 81993^2 + 117313^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3109488 + ... + 3116068.

Almost surely, 2^20485192018 is an apocalyptic number.

20485192018 is a deficient number, since it is larger than the sum of its proper divisors (10333969862).

20485192018 is a wasteful number, since it uses less digits than its factorization.

20485192018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10973.

The product of its (nonzero) digits is 46080, while the sum is 40.

The spelling of 20485192018 in words is "twenty billion, four hundred eighty-five million, one hundred ninety-two thousand, eighteen".