20551714017 has 64 divisors (see below), whose sum is σ = 29268366336. Its totient is φ = 12813465600.

The previous prime is 20551714013. The next prime is 20551714019. The reversal of 20551714017 is 71041715502.

It is not a de Polignac number, because 20551714017 - 2² = 20551714013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20551714013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55098243 + ... + 55098615.

It is an arithmetic number, because the mean of its divisors is an integer number (457318224).

Almost surely, 2^20551714017 is an apocalyptic number.

It is an amenable number.

20551714017 is a deficient number, since it is larger than the sum of its proper divisors (8716652319).

20551714017 is a wasteful number, since it uses less digits than its factorization.

20551714017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650.

The product of its (nonzero) digits is 9800, while the sum is 33.

The spelling of 20551714017 in words is "twenty billion, five hundred fifty-one million, seven hundred fourteen thousand, seventeen".