20447406955 has 8 divisors (see below), whose sum is σ = 24540064704. Its totient is φ = 16355808000.

The previous prime is 20447406949. The next prime is 20447406961. The reversal of 20447406955 is 55960474402.

It is an interprime number because it is at equal distance from previous prime (20447406949) and next prime (20447406961).

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

It is a de Polignac number, because none of the positive numbers 2^k-20447406955 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221571 + ... + 299980.

It is an arithmetic number, because the mean of its divisors is an integer number (3067508088).

Almost surely, 2^20447406955 is an apocalyptic number.

20447406955 is a deficient number, since it is larger than the sum of its proper divisors (4092657749).

20447406955 is an equidigital number, since it uses as much as digits as its factorization.

20447406955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529397.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 20447406955 in words is "twenty billion, four hundred forty-seven million, four hundred six thousand, nine hundred fifty-five".