20285325437 has 8 divisors (see below), whose sum is σ = 21846929496. Its totient is φ = 18723892032.

The previous prime is 20285325407. The next prime is 20285325451. The reversal of 20285325437 is 73452358202.

It can be written as a sum of positive squares in 4 ways, for example, as 3971394361 + 16313931076 = 63019^2 + 127726^2 .

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 20285325437 - 2¹⁶ = 20285259901 is a prime.

It is a super-2 number, since 2×20285325437² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20285325394 and 20285325403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285325407) 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, 315863 + ... + 374619.

It is an arithmetic number, because the mean of its divisors is an integer number (2730866187).

Almost surely, 2^20285325437 is an apocalyptic number.

It is an amenable number.

20285325437 is a deficient number, since it is larger than the sum of its proper divisors (1561604059).

20285325437 is a wasteful number, since it uses less digits than its factorization.

20285325437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85327.

The product of its (nonzero) digits is 403200, while the sum is 41.

The spelling of 20285325437 in words is "twenty billion, two hundred eighty-five million, three hundred twenty-five thousand, four hundred thirty-seven".