20409917237 has 8 divisors (see below), whose sum is σ = 21096379392. Its totient is φ = 19725210000.

The previous prime is 20409917197. The next prime is 20409917263. The reversal of 20409917237 is 73271990402.

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

It is a cyclic number.

It is not a de Polignac number, because 20409917237 - 2¹² = 20409913141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20409911237) 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, 415058 + ... + 461619.

It is an arithmetic number, because the mean of its divisors is an integer number (2637047424).

Almost surely, 2^20409917237 is an apocalyptic number.

It is an amenable number.

20409917237 is a deficient number, since it is larger than the sum of its proper divisors (686462155).

20409917237 is an equidigital number, since it uses as much as digits as its factorization.

20409917237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877459.

The product of its (nonzero) digits is 190512, while the sum is 44.

The spelling of 20409917237 in words is "twenty billion, four hundred nine million, nine hundred seventeen thousand, two hundred thirty-seven".