20408738837 has 8 divisors (see below), whose sum is σ = 20578747392. Its totient is φ = 20238876000.

The previous prime is 20408738827. The next prime is 20408738843. The reversal of 20408738837 is 73883780402.

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 20408738837 - 2¹² = 20408734741 is a prime.

It is a super-2 number, since 2×20408738837² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20408738827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254462 + ... + 324912.

It is an arithmetic number, because the mean of its divisors is an integer number (2572343424).

Almost surely, 2^20408738837 is an apocalyptic number.

It is an amenable number.

20408738837 is a deficient number, since it is larger than the sum of its proper divisors (170008555).

20408738837 is a wasteful number, since it uses less digits than its factorization.

20408738837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72859.

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 20408738837 in words is "twenty billion, four hundred eight million, seven hundred thirty-eight thousand, eight hundred thirty-seven".