217420950004 has 24 divisors (see below), whose sum is σ = 391031172000. Its totient is φ = 105701684256.

The previous prime is 217420949983. The next prime is 217420950007. The reversal of 217420950004 is 400059024712.

It is a super-5 number, since 5×217420950004⁵ (a number of 58 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217420950007) 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, 268162 + ... + 711865.

It is an arithmetic number, because the mean of its divisors is an integer number (16292965500).

Almost surely, 2^217420950004 is an apocalyptic number.

It is an amenable number.

217420950004 is a deficient number, since it is larger than the sum of its proper divisors (173610221996).

217420950004 is a wasteful number, since it uses less digits than its factorization.

217420950004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981567 (or 981565 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

Adding to 217420950004 its reverse (400059024712), we get a palindrome (617479974716).

The spelling of 217420950004 in words is "two hundred seventeen billion, four hundred twenty million, nine hundred fifty thousand, four".