20896335387731 has 2 divisors, whose sum is σ = 20896335387732. Its totient is φ = 20896335387730.

The previous prime is 20896335387677. The next prime is 20896335387751. The reversal of 20896335387731 is 13778353369802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20896335387731 - 2²² = 20896331193427 is a prime.

It is a super-2 number, since 2×20896335387731² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20896335387751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10448167693865 + 10448167693866.

It is an arithmetic number, because the mean of its divisors is an integer number (10448167693866).

Almost surely, 2^{20896335387731} is an apocalyptic number.

20896335387731 is a deficient number, since it is larger than the sum of its proper divisors (1).

20896335387731 is an equidigital number, since it uses as much as digits as its factorization.

20896335387731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137168640, while the sum is 65.

The spelling of 20896335387731 in words is "twenty trillion, eight hundred ninety-six billion, three hundred thirty-five million, three hundred eighty-seven thousand, seven hundred thirty-one".