20017018536870 has 16 divisors (see below), whose sum is σ = 48040844488560. Its totient is φ = 5337871609824.

The previous prime is 20017018536859. The next prime is 20017018536883. The reversal of 20017018536870 is 7863581071002.

It is a happy number.

It is a super-2 number, since 2×20017018536870² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 333616975585 + ... + 333616975644.

It is an arithmetic number, because the mean of its divisors is an integer number (3002552780535).

Almost surely, 2^{20017018536870} is an apocalyptic number.

20017018536870 is an abundant number, since it is smaller than the sum of its proper divisors (28023825951690).

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

20017018536870 is a wasteful number, since it uses less digits than its factorization.

20017018536870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667233951239.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 20017018536870 in words is "twenty trillion, seventeen billion, eighteen million, five hundred thirty-six thousand, eight hundred seventy".