20763541979 has 8 divisors (see below), whose sum is σ = 21164291280. Its totient is φ = 20363125536.

The previous prime is 20763541951. The next prime is 20763542047. The reversal of 20763541979 is 97914536702.

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

It is a cyclic number.

It is not a de Polignac number, because 20763541979 - 2⁸ = 20763541723 is a prime.

It is a super-2 number, since 2×20763541979² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20763541979.

It is not an unprimeable number, because it can be changed into a prime (20763541079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44624 + ... + 208610.

It is an arithmetic number, because the mean of its divisors is an integer number (2645536410).

Almost surely, 2^20763541979 is an apocalyptic number.

20763541979 is a deficient number, since it is larger than the sum of its proper divisors (400749301).

20763541979 is a wasteful number, since it uses less digits than its factorization.

20763541979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166429.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The spelling of 20763541979 in words is "twenty billion, seven hundred sixty-three million, five hundred forty-one thousand, nine hundred seventy-nine".