20764299698 has 8 divisors (see below), whose sum is σ = 32978593692. Its totient is φ = 9771435136.

The previous prime is 20764299691. The next prime is 20764299719. The reversal of 20764299698 is 89699246702.

It can be written as a sum of positive squares in 2 ways, for example, as 20344172689 + 420127009 = 142633^2 + 20497^2 .

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

It is a super-2 number, since 2×20764299698² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20764299698.

It is not an unprimeable number, because it can be changed into a prime (20764299691) 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, 305357315 + ... + 305357382.

Almost surely, 2^20764299698 is an apocalyptic number.

20764299698 is a deficient number, since it is larger than the sum of its proper divisors (12214293994).

20764299698 is a wasteful number, since it uses less digits than its factorization.

20764299698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610714716.

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 20764299698 in words is "twenty billion, seven hundred sixty-four million, two hundred ninety-nine thousand, six hundred ninety-eight".