20267236947 has 8 divisors (see below), whose sum is σ = 27894691840. Its totient is φ = 13075636680.

The previous prime is 20267236943. The next prime is 20267236963. The reversal of 20267236947 is 74963276202.

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

It is not a de Polignac number, because 20267236947 - 2² = 20267236943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20267236896 and 20267236905.

It is not an unprimeable number, because it can be changed into a prime (20267236943) by changing a digit.

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, 108963547 + ... + 108963732.

It is an arithmetic number, because the mean of its divisors is an integer number (3486836480).

Almost surely, 2^20267236947 is an apocalyptic number.

20267236947 is a deficient number, since it is larger than the sum of its proper divisors (7627454893).

20267236947 is a wasteful number, since it uses less digits than its factorization.

20267236947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217927313.

The product of its (nonzero) digits is 1524096, while the sum is 48.

The spelling of 20267236947 in words is "twenty billion, two hundred sixty-seven million, two hundred thirty-six thousand, nine hundred forty-seven".