20709265443 has 8 divisors (see below), whose sum is σ = 28199851008. Its totient is φ = 13512428424.

The previous prime is 20709265439. The next prime is 20709265469. The reversal of 20709265443 is 34456290702.

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

It is not a de Polignac number, because 20709265443 - 2² = 20709265439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20709265395 and 20709265404.

It is not an unprimeable number, because it can be changed into a prime (20709265483) 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, 73436971 + ... + 73437252.

It is an arithmetic number, because the mean of its divisors is an integer number (3524981376).

Almost surely, 2^20709265443 is an apocalyptic number.

20709265443 is a deficient number, since it is larger than the sum of its proper divisors (7490585565).

20709265443 is a wasteful number, since it uses less digits than its factorization.

20709265443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146874273.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 20709265443 in words is "twenty billion, seven hundred nine million, two hundred sixty-five thousand, four hundred forty-three".