20954829679 has 8 divisors (see below), whose sum is σ = 24061877888. Its totient is φ = 17876156760.

The previous prime is 20954829647. The next prime is 20954829689. The reversal of 20954829679 is 97692845902.

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

It is not a de Polignac number, because 20954829679 - 2⁵ = 20954829647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20954829619) 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, 7092237 + ... + 7095190.

It is an arithmetic number, because the mean of its divisors is an integer number (3007734736).

Almost surely, 2^20954829679 is an apocalyptic number.

20954829679 is a deficient number, since it is larger than the sum of its proper divisors (3107048209).

20954829679 is a wasteful number, since it uses less digits than its factorization.

20954829679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14187645.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 20954829679 in words is "twenty billion, nine hundred fifty-four million, eight hundred twenty-nine thousand, six hundred seventy-nine".