20286909739 has 4 divisors (see below), whose sum is σ = 20287236640. Its totient is φ = 20286582840.

The previous prime is 20286909707. The next prime is 20286909763. The reversal of 20286909739 is 93790968202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20286909739 - 2⁵ = 20286909707 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 20286909739.

It is not an unprimeable number, because it can be changed into a prime (20286909439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38547 + ... + 205084.

It is an arithmetic number, because the mean of its divisors is an integer number (5071809160).

Almost surely, 2^20286909739 is an apocalyptic number.

20286909739 is a deficient number, since it is larger than the sum of its proper divisors (326901).

20286909739 is an equidigital number, since it uses as much as digits as its factorization.

20286909739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326900.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 20286909739 in words is "twenty billion, two hundred eighty-six million, nine hundred nine thousand, seven hundred thirty-nine".