20171137154 has 8 divisors (see below), whose sum is σ = 34579092288. Its totient is φ = 8644773060.

The previous prime is 20171137141. The next prime is 20171137187. The reversal of 20171137154 is 45173117102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20171137154.

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, 720397742 + ... + 720397769.

It is an arithmetic number, because the mean of its divisors is an integer number (4322386536).

Almost surely, 2^20171137154 is an apocalyptic number.

20171137154 is a deficient number, since it is larger than the sum of its proper divisors (14407955134).

20171137154 is a wasteful number, since it uses less digits than its factorization.

20171137154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440795520.

The product of its (nonzero) digits is 5880, while the sum is 32.

The spelling of 20171137154 in words is "twenty billion, one hundred seventy-one million, one hundred thirty-seven thousand, one hundred fifty-four".