20170030655 has 4 divisors (see below), whose sum is σ = 24204036792. Its totient is φ = 16136024520.

The previous prime is 20170030649. The next prime is 20170030721. The reversal of 20170030655 is 55603007102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20170030655 - 2¹⁶ = 20169965119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2017003061 + ... + 2017003070.

It is an arithmetic number, because the mean of its divisors is an integer number (6051009198).

Almost surely, 2^20170030655 is an apocalyptic number.

20170030655 is a deficient number, since it is larger than the sum of its proper divisors (4034006137).

20170030655 is an equidigital number, since it uses as much as digits as its factorization.

20170030655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034006136.

The product of its (nonzero) digits is 6300, while the sum is 29.

Adding to 20170030655 its reverse (55603007102), we get a palindrome (75773037757).

The spelling of 20170030655 in words is "twenty billion, one hundred seventy million, thirty thousand, six hundred fifty-five".