20835423337 has 8 divisors (see below), whose sum is σ = 21693502152. Its totient is φ = 19994006400.

The previous prime is 20835423293. The next prime is 20835423383. The reversal of 20835423337 is 73332453802.

It can be written as a sum of positive squares in 4 ways, for example, as 259242201 + 20576181136 = 16101^2 + 143444^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20835423337 is a prime.

It is a super-2 number, since 2×20835423337² (a number of 21 digits) contains 22 as substring.

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 20835423337.

It is not an unprimeable number, because it can be changed into a prime (20835423937) 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, 4162918 + ... + 4167919.

It is an arithmetic number, because the mean of its divisors is an integer number (2711687769).

Almost surely, 2^20835423337 is an apocalyptic number.

It is an amenable number.

20835423337 is a deficient number, since it is larger than the sum of its proper divisors (858078815).

20835423337 is an equidigital number, since it uses as much as digits as its factorization.

20835423337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8330939.

The product of its (nonzero) digits is 362880, while the sum is 40.

The spelling of 20835423337 in words is "twenty billion, eight hundred thirty-five million, four hundred twenty-three thousand, three hundred thirty-seven".