20018519502738 has 32 divisors (see below), whose sum is σ = 40798583226432. Its totient is φ = 6545953627200.

The previous prime is 20018519502721. The next prime is 20018519502853. The reversal of 20018519502738 is 83720591581002.

It is a super-2 number, since 2×20018519502738² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2607168 + ... + 6843563.

It is an arithmetic number, because the mean of its divisors is an integer number (1274955725826).

Almost surely, 2^{20018519502738} is an apocalyptic number.

20018519502738 is an abundant number, since it is smaller than the sum of its proper divisors (20780063723694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20018519502738 is a wasteful number, since it uses less digits than its factorization.

20018519502738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457450.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 20018519502738 in words is "twenty trillion, eighteen billion, five hundred nineteen million, five hundred two thousand, seven hundred thirty-eight".