20518368670 has 8 divisors (see below), whose sum is σ = 36933063624. Its totient is φ = 8207347464.

The previous prime is 20518368667. The next prime is 20518368677. The reversal of 20518368670 is 7686381502.

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 20518368670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20518368677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025918424 + ... + 1025918443.

It is an arithmetic number, because the mean of its divisors is an integer number (4616632953).

Almost surely, 2^20518368670 is an apocalyptic number.

20518368670 is a deficient number, since it is larger than the sum of its proper divisors (16414694954).

20518368670 is a wasteful number, since it uses less digits than its factorization.

20518368670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051836874.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 20518368670 in words is "twenty billion, five hundred eighteen million, three hundred sixty-eight thousand, six hundred seventy".