20544479323 has 16 divisors (see below), whose sum is σ = 21007467936. Its totient is φ = 20085891840.

The previous prime is 20544479303. The next prime is 20544479339. The reversal of 20544479323 is 32397444502.

It is a cyclic number.

It is not a de Polignac number, because 20544479323 - 2³³ = 11954544731 is a prime.

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 20544479323.

It is not an unprimeable number, because it can be changed into a prime (20544479303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12549261 + ... + 12550897.

It is an arithmetic number, because the mean of its divisors is an integer number (1312966746).

Almost surely, 2^20544479323 is an apocalyptic number.

20544479323 is a deficient number, since it is larger than the sum of its proper divisors (462988613).

20544479323 is a wasteful number, since it uses less digits than its factorization.

20544479323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 20544479323 in words is "twenty billion, five hundred forty-four million, four hundred seventy-nine thousand, three hundred twenty-three".