20217018336870 has 32 divisors (see below), whose sum is σ = 48521127843072. Its totient is φ = 5391173352672.

The previous prime is 20217018336811. The next prime is 20217018336871. The reversal of 20217018336870 is 7863381071202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20217018336871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3490959 + ... + 7254021.

It is an arithmetic number, because the mean of its divisors is an integer number (1516285245096).

Almost surely, 2^{20217018336870} is an apocalyptic number.

20217018336870 is an abundant number, since it is smaller than the sum of its proper divisors (28304109506202).

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

20217018336870 is a wasteful number, since it uses less digits than its factorization.

20217018336870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942156.

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 20217018336870 in words is "twenty trillion, two hundred seventeen billion, eighteen million, three hundred thirty-six thousand, eight hundred seventy".