20454872579 has 8 divisors (see below), whose sum is σ = 21559753680. Its totient is φ = 19352822400.

The previous prime is 20454872567. The next prime is 20454872609. The reversal of 20454872579 is 97527845402.

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

It is not a de Polignac number, because 20454872579 - 2⁴ = 20454872563 is a prime.

It is a super-2 number, since 2×20454872579² (a number of 21 digits) contains 22 as substring.

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 20454872579.

It is not an unprimeable number, because it can be changed into a prime (20454872539) 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, 692882 + ... + 721799.

It is an arithmetic number, because the mean of its divisors is an integer number (2694969210).

Almost surely, 2^20454872579 is an apocalyptic number.

20454872579 is a deficient number, since it is larger than the sum of its proper divisors (1104881101).

20454872579 is a wasteful number, since it uses less digits than its factorization.

20454872579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415461.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 20454872579 in words is "twenty billion, four hundred fifty-four million, eight hundred seventy-two thousand, five hundred seventy-nine".