20896915739 has 4 divisors (see below), whose sum is σ = 23882189424. Its totient is φ = 17911642056.

The previous prime is 20896915709. The next prime is 20896915751. The reversal of 20896915739 is 93751969802.

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

It is not a de Polignac number, because 20896915739 - 2¹² = 20896911643 is a prime.

It is a super-2 number, since 2×20896915739² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20896915709) 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, 1492636832 + ... + 1492636845.

It is an arithmetic number, because the mean of its divisors is an integer number (5970547356).

Almost surely, 2^20896915739 is an apocalyptic number.

20896915739 is a deficient number, since it is larger than the sum of its proper divisors (2985273685).

20896915739 is an equidigital number, since it uses as much as digits as its factorization.

20896915739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985273684.

The product of its (nonzero) digits is 7348320, while the sum is 59.

The spelling of 20896915739 in words is "twenty billion, eight hundred ninety-six million, nine hundred fifteen thousand, seven hundred thirty-nine".